Re: [R] Quantile Regression: Measuring Goodness of Fit
Hi Martin, Efferz, Martin efferz at finance.uni-mainz.de writes: Hi, how to measure the goodness of fit, when using the rq() function of quantreg? I need something like an R^2 for quantile regression, a single number which tells me if the fit of the whole quantile process (not only for a single quantile) is o.k. or not. Is it possible to compare the (conditional) quantile process with the (unconditional) empirical distribution function? Perhaps with a Chi^2 or Kolmogorv-Smirnov Test? Thanks for feedback. Martin Please see: http://www.econ.uiuc.edu/~roger/research/rq/rq.html Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Re : Book recommendation for newbie to stats and R?
Hi Kevin, justin bem justin_bem at yahoo.fr writes: Exact reference is : Wonnacot, T., Wonnacot, R., Introductory Statistics for Business and Economics, New York, 1990 Though now about R, a good book to read for analyzing non-experimental data (and even experimental data) is Identification Problems in the Social Sciences by Charles Manski. It is a small, clearly written book, with examples. Providing a reasonable answer (including caveats) to the kind of typical problem you described in your initial post will benefit from this. You should atleast consider this an important supplement. See the link below. Anupam. http://www.hup.harvard.edu/catalog/MANIDE.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Review process for new packages
Hello, Duncan Murdoch murdoch at stats.uwo.ca writes: On 10/17/2006 2:22 AM, Andreas Wittmann wrote: Hi all, i'm currently working on a creditmetrics package which includes functions for computing the credit risk model creditmetrics. I guess it would be finished in a few days. My question now is, does there exist some review process before sending it to ctan or is it reviewed after having sended it? There's no review process to decide whether your package is useful or well-written. If you want that kind of review you should submit it to the Journal of Statistical Software. Although, this is a sensitive issue, it is unfortunate that such review (or comment, if that is a more suitable word) process is not available at R. Is it possible to have some process where people can provide comments, even if it is not a journal review. It can help in improving the quality of packages submitted to R, in reducing bugs, or simply catching errors (coding and non-coding) that the author may have over-looked by mistake. Will contributing something to R, on provisional basis, and then asking for comments, and then submitting a final version work? It may also help to require the author to include a mathematical description of what has been submitted, if it is a statistical function. This be because most new users find it difficult to read R code at the level of functions. They may also not be familiar with the statistical concept, but may know about it mathematically---because different disciplines have differentiated their specialized terminology (with some variation) as discipline specific statistical applications have evolved. I think this will make R more accessible to a wider user-base. ---Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] grep function with patterns list...
Hi Stephane, Stéphane CRUVEILLER scruveil at genoscope.cns.fr writes: is there a way to pass a list of patterns to the grep function? I vaguely remember something with %in% operator... I think you are looking for the %in% and %nin% which are part of Design package, and also in Hmisc library. You have to install and load these packages to access these functions. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] R Graphics: Saving PDF and other formats from Windows Graphic Device for LaTeX
Hello, I can't seem to save (or find the default location) when I use the Window Graphic Device's pull down menu. It does not seem to save to the directory I have set using setwd(...). How do I make the pull down menu's work? What is the best format to save R graphics for inclusion into a LaTeX documents? I will use PdfTex, or LaTeX - PS - PsToPdf to generate the final PDF file. Which is likely to give the best graphics quality in the final PDF document? The final graphs will be about 3x3 inch (fit in a column in two-column format). I will be grateful if someone can share their experience. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] R Graphics: Saving PDF and other formats from Win dows Graphic Device for LaTeX
Thanks. That worked. I am using the following to set-up the device:
pdf(sgr6100.pdf, horizontal=FALSE, onefile=FALSE,
height=3, width=3, pointsize=6)
Reducing point-size below 6 does not seem to make any difference to
the size of text and symbols. Any suggestions to get smaller font sizes?
I am using WinEdt with MikTeX set-up.
Any suggestions about something, or some packages,
that might improve graphics inclusion.
Latex complains about the [scale...] part for any scale in
\includegraphics[scale=1]{}
and pauses. Suggestions will be appreciated about what is the best way to scale
R graphics for inclusion in LaTeX.
Anupam.
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[R] Listing contents of .zip
Hi, how do I list the contents of a .zip archive before creating a connection with unz to a file in the archive? Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] plotting
Dieter Menne dieter.menne at menne-biomed.de writes: Is there something in R that will display both observed values and their influence on calculated statistics? In general : yes. You may give the example in the lm documentation a first try, and then rephrase your question. Thanks for the pointer. I found what I was looking for in lm.influence and influence.measures. I was looking for Cook's Distance some other influence measures. I guess I want to plot the fitted values, observations and influence measures on the same plot. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] pie() with only 180°
Thomas Steiner finbref.2006 at gmail.com writes: I want to plot the results of today's elections in Austria in this typical 180°-piechart (and not 360°). Unfortunantely pie() has just an argument init.angle and no end.angle. Perhaps you know a workaround. Thomas Please look up the function fan.plot Jim Lemmon had posted last month in reply to a question by me. You may be able to tweak that and make 180-degree plots. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] if (NULL) is error?
Alberto Vieira Ferreira Monteiro albmont at centroin.com.br writes: Why this is not valid? test - NULL if (test) test What are you trying to do with these statements? I think setting test to False may do what you want. Of couse, I am just guessing. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] plotting
Is there something in R that will display both observed values and their influence on calculated statistics? Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Setting NA
Is there a way to set NA values in R, without changing the dataframe? I would like to use different combinations of non-response values, as if they were NA for some of the computations. I don't want to change the dataframe each time I have to do this? Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] working with summarized data
Hi Rick, I came across your posting that I had replied to. I had assumed from your posting that you had positive integer weights, and that you had a certain kind of stratified sampling. For a general case, you may want to look at survey package. Graphical representation of survey data, specially large surveys, is a good research issue in statistical graphics. R seems to be is suitable for doing this kind of work. Anupam. Anupam Tyagi wrote the following on 8/31/2006 10:40 AM: One solution is to simulate the population by repeating each row weight number of times. This is inefficient. It may create a very large dataset for a large sample survey. But some of graphs and other things may turn out to your liking, depending upon how the functions are written. Anupam. Rick Bischoff wrote the following on 8/30/2006 7:57 PM: The data sets I am working with all have a weight variable--e.g., each row doesn't mean 1 observation. With that in mind, nearly all of the graphs and summary statistics are incorrect for my data, because they don't take into account the weight. For example median is incorrect, as the quantiles aren't calculated with weights: sum( weights[X median(X)] ) / sum(weights) This should be 0.5... of course it's not. Unfortunately, it seems that most(all?) of R's graphics and summary statistic functions don't take a weight or frequency argument. (Fortunately the models do...) Am I completely missing how to do this? One way would be to replicate each row proportional to the weight (e.g. if the weight was 4, we would 3 additional copies) but this will get prohibitive pretty quickly as the dataset grows. Thanks in advance! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] working with summarized data
Thomas Lumley tlumley at u.washington.edu writes: On Wed, 30 Aug 2006, Rick Bischoff wrote: Unfortunately, it seems that most(all?) of R's graphics and summary statistic functions don't take a weight or frequency argument. (Fortunately the models do...) I have been been meaning to add this functionality to my graphics package ggplot (http://had.co.nz/ggplot), but unfortunately haven't had time yet. I'm guessing you want something like: * scatterplot: scale size of point according to weight (can do) * bar chart: bars should have height proportional to weight (can do) * histogram: area proportion to weighting variable (have some half finished code to do) * smoothers: should automatically use weights * boxplot: use weighted quantiles/letter statistics (is there a function for that?) What else is there? densityplot is the only other one I can think of at the moment... With the rest of those, I could certainly live without it though! Density plots, scatterplot smoothers, hexbin plots, bubble plots, histograms, and boxplots are available in the survey package. These are probability-weighted rather than frequency-weighted but it doesn't matter for graphics. You could use them as is (which requires setting up a survey design object) or rip the internals out of them. -thomas I came across this posting that I had replied to earlier. I had assumed from the original question that the data had positive integer weights, and that it had a certain kind of stratified sampling. For a general case, survey package and perhaps ggplots seem suitable to make these graphical extensions. survey also takes into account survey design. I think graphical representation of survey data, specially large surveys, is a good research issue in statistical graphics. For example, I am not convinced that making the area of a graphical symbol a function of survey weight gives easily perceived and interpretable results: like a bars in a bar-plot or histogram. Is there an implementation of graphical functions that are conceptually similar to graphical respresntations of robust statistics (which modify the weights of observations)? R seems to be suitable for doing this kind of work. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Extention of Pie Chart in R (was Re: Adding percentage to Pie Charts)
Jim Lemon jim at bitwrit.com.au writes: I admit to interpreting this pretty loosely, but I would like to know what people think of a fan plot. Hi all, I tried the fan.plots that Jim has been very nice to provide. It made me think if there was something like, clock.plots in R? Something like the following, anything that comes close? The idea an extention in yet another way of Pie Charts, extending the fan.plots provided by Jim. * A value will be depicted on a clock.plot using 1 or 2 hands of an analog clock on a circle calibrated from 0 to 100 (same as 0). * For values between 0 and 99 use the position of only one hand of the clock (needle). * For values of 100, use the second hand (needle), and move it to 1. * Some way to identify needles, and two two overlapping needles. * Use color coding or line-types to differentiate variables. This is basically a clock calibrated on a scale of 100, rather than 60. It can visually depict values between 1 and 1. Do we have something like this R? Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] read.xport: Writing and reading dataframe to disk directly
Hi All, is there a way of directly writing to disk file, the dataframe or list of dataframes that result from read.xport function. This function converts SAS export files to R dataframes. I would like to convert a SAS transport file to R, but the resulting R dataframes do not fit in the memory of my computer. Is there way to write the output of this fucntion to disk, perhaps using some pipe or connection facility. Something like, filexpt.lst - lookup.xport(file.xpt) # works very well and returns a list with all kind of information about variable # name, format, labels, etc. save(filexpt.df - read.xport(file.xpt), file=filexpt.Rdata) # from what I can tell, this will not work. ? Is there a way to use a pipe or connection to write filexpt.df to disk as it is being created? ? Is there a way to use a connection to an R dataframe on disk, so I can get subsets (rows or colums) from the dataframe on disk, without having to read it into memory? I will be thankful for your help and suggestions. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] colClasses: supressed 'NA'
Hi, The colClasses seem to be supressing 'NA' vlaues. How do I fix this? R script and first 5 lines of output is below. File test2.dat has blanks that are read as NA when I do not use 'colClasses', but as blanks when I use 'colClasses'. temp.df - read.fwf(test2.dat, width=c(10,1,1,1,1,2,2,3,3,1), col.names=c(psu,losewt,maintain,fewcal,phyact,age,income,weight, wtdesire,gender), colClasses=c(factor,factor,factor,factor,factor,numeric,factor, numeric,numeric,factor), nrows=27, comment.char=) temp.df psu losewt maintain fewcal phyact age income weight wtdesire gender 1 2003009323 2252 05220 220 1 2 2003005181 21 2 2 58 08165 145 2 3 2003015942 21 4 1 76 05142 130 2 4 2003011406 21 3 1 43 03110 110 2 5 2003006786 1 4 1 49 06178 145 2 ? why am I not getting missing values when I use 'colClasses'? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] colClasses: supressed 'NA'
Uwe Ligges ligges at statistik.uni-dortmund.de writes: Well, you say it should be a factor, hence is taken as a level. And why not a level. Thanks for drawing my attention to it. It is common mistake that is easy to slip attention. Thanks a lot. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Passing R connection as argument to a shell command on Windows
Hello, is there a way to pass a connection to a file in a zipped archive as argument (instead of a file name of unzipped file) to shell command cut. In general, is it possible to pipe output of a R function to a shell command? How? I want to do something like: z = unz(zipArchive.zip, fileASCII.ASC) # open connection open(z) # cut lines of the ASCII file in zipped archive at specific postions and send results to another file. shell(cut -c2-3,5-8 z test2.dat) Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Adding percentage to Pie Charts
Gabor Grothendieck ggrothendieck at gmail.com writes: It might also be nice to be able to align the fans at the left or right, not just the center. Fans that open only on one side: A line that moves like the minute needle of an analog clock; with zero at the top. Movement of the needle in clock-wise direction represents the number (precentage). Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Best use of LaTeX listings package for pretty printing R code
Frank E Harrell Jr f.harrell at vanderbilt.edu writes: This is what I have been using. Does anyone have a better way? In particular I would like to see letters in comment strings not stretched so much. Thanks -Frank It may be possible to pass on all comments to a verbatim like environment inside the listings environment, by defining and redefining the preamble to listings. I hope it does not interfere with something else in LaTeX. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] newie help needed
Julie Harold j.m.harold at uea.ac.uk writes: 1. is there a gui interface ? How do we use it ? R --gui just gets us to the command line. Look at SciViews. Not a 100% menu driven GUI, but can be useful to new users. 3. can we define default directories - eg for data files ? I think you can, because sys-admin at my former university did so some years ago. May be using a symbolic link---I am not sure though. 4. we want to use this mainly in batch mode once we get our act together - are there any good examples of batch scripts we can use as crib sheets. creating a new and simplified batch command for users may be helpful, rather than allowing them to use the system batch, at or related commands. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] looking for some functions to analyze a data set.
Taka Matzmoto sell_mirage_ne at hotmail.com writes: Hi R-users I have a data set. There are 10 products and the numbers of people who ranked the products. ... Is there any other way I can summarize this data? Be sure to know what assumptions are implicit in the procedures you are using to do this. Any procedure you use will violate some assumption that seems quite intutively appealing. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Union of two data frames
Kartik Pappu kartik.pappu at gmail.com writes: Essentially, I want to make a union of the two data frames. I hope this question makes sense. See merge(...), and have a look at R intro. Also check documentation for Design package. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Beginners manual for emacs and ess
Rainer M Krug rkrug at sun.ac.za writes: Is there anywhere a beginners manual for Emacs ESS to be used with R? even M-x S tells me it can't start S-Plus - obviously - but I want it to start R... Please also look at John Fox's Xemacs+ESS intro. http://socserv.mcmaster.ca/jfox/Books/Companion/ESS/ Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Adding percentage to Pie Charts (was (no subject))
Greg Snow Greg.Snow at intermountainmail.org writes: Have you read the books by Cleveland? I do not recall reading Cleveland's book; I have read one by Tufte. You raise some interesting issues there. I agree with some, I could not clearly understand some other things you mention. I think visual perception is aquired, in part. So if I were presenting data to viewers who took carpentry or other such classes in highschool I may be tempted to use dotcarts. An interesting experiment: have kids compare pieces of pie or bread-sticks over a dinner, and check how they do. They should not have taken a carpentry class. I use dot-charts, they are useful. Sometimes pie carts are useful too, because people are so used to using and seeing them over a long time. Ofcourse, they can be improved. Also, it may be possible to put points of a dot-chart on a single straight line, label them with a pointing line, and get better perception. There is poor perception of the horizantal distance, by having to view that extra vertical distance in a dotchart. However, it is useful to have the vertical axis in Lattice plots, but not in stand-alone dot-charts. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Comparison of correlation coefficients
Peter Dalgaard p.dalgaard at biostat.ku.dk writes: No, he wants to compare two correlation coefficients, not test that one is zero. That's usually a misguided question, but if need be, the Fisher z transform atanh(r) can be used to convert r to an approximately normal variate with a known variance 1/(N-3) and comparing r1 and r2 from two independent samples is straightforward. The correlated case (like cor(x,y) vs cor(x,z)) is more complicated. It seem the more complicated case is often of more substantive interest in many settings: is children's income more strongly correlated with parent's education than parent's income? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Adding percentage to Pie Charts (was (no subject))
Greg Snow Greg.Snow at intermountainmail.org writes: You may want to rethink your whole approach here: 1. Pie charts are usually a poor choice of graph, there are better choices. 2. Adding percentages to a pie chart is a way of admitting that the pie chart is not doing the job. 3. If you want people to compare percentages, then a table is what is needed. 4. A pie chart with percentages added is essentially a colorful but poorly layed out table. Consider using a dotplot instead of a pie chart, it changes the job of the viewer from comparing areas/angles (done poorly by humans) to comparing positions along a common scale (done well by humans). I think dot charts (plots) are very useful, but they are not substitutes for a pie chart: they do not show a comparison between the total and the individual value; have a different scale (linear, usually), and are visually not suitable to answer some questions that a pie chart can answer (is the value approximately less than a fourth of the total? Is it less than half?). For some of these questions, even dot-charts require a value label, or the user doing mental calculations to guess approximations. I think I am quite attuned to getting approximate fractions from a pie-chart in shorter time, than on a linear scale like the dot-chart. A modification in a pie chart that draws overlapping areas with a common start point at the top of the circle, can make is more informative than a dot-chart. Something like: * Start drawing at the top of the circle, as zero (degree/area). * Draw the representation of every value starting from the top, as zero, representing it as a labled line from the center of the circle to the boundary (can use colors where possible). * Use two lables for the circular axis, inside one for percentages, outside for values. What is the simplest way to draw this in R? Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Comparison of correlation coefficients
Anupam Tyagi AnupTyagi at yahoo.com writes: It seem the more complicated case is often of more substantive interest in many settings: is children's income more strongly correlated with parent's education than parent's income? An even better example (same measurement scale)---Questions like this get asked quite often in practice: Is a child's income/wealth more strongly correlated with a parent's income than parent's wealth? And some variants. I think there is some literature on inference on marginals and conditional distributions, and bounds that may be useful: Search: James Heckman, Charles Manski. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] multiple density function
march marcella.marinelli at uniroma1.it writes: Hi everybody I'm new in R so the question will be easy for you I'm running multiple density functions taking account of the following conditions: mean=seq(10,1,length=10) var=seq(3,1,length=10) How can I describe the density functions on the same chart? thanks Marcella Hi Marcella, I am not sure of what you are specifically trying to do, but if you want more than one set of points on the same graph (chart) use points after plot. See examples in the graphics part of R documentation. e.g. plot(...) points(...) Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] predict with logistic regression
Jan Sabee jan.sabee at gmail.com writes: I know that is probability of predict for new dataset. My question is how can I know each probability according to class (sore). I mean that I need the result of predit something like (M=1, F=0): 1 2 3 4 5 6 7 8 9 10 1 0 0 0 1 0 1 1 0 1 As I understand your question: you have the probability, and you can use these to decide whether you think it is high enough for you to think whether it is M=1 or F=0. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] what does Height represent?
zhaoshi zhaoshi at u.washington.edu writes: hi-- I am new to R and try to use R cluster my binary data. I use hierarchical clustering plot (hclust (dist(x,method=binary),method=average),cex=0.1) I end up with a cluster Dendrogram. On the left of my dendrogram, there is scale called Height from 0.0 to 1.0. I don't understand what does Height represent. If the Height represents the distance scale between two different data point, it looks like if I add up the length of each branch, I end up with distance of some pairs 1. It is not possible the distance between any data point will greater than 1. Could some help me out? Hi zhaoshi, please check the documentation for the function using ?hclust. You may also want to look at a book that uses R/S-plus for cluster analysis. Venables and Ripley's Modern Applied Statistics with S-plus Chapter 11 may be of some help. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] bubble plot problems
Pieter Provoost pieterprovoost at gmail.com writes: I'm having some problems with a bubble plot (ps package). I don't want tick marks on all four sides (just two), I want to have a smaller font size, and I would like to be able to define bubble sizes shown in the legend (now it shows 0, 0, 0, 9.747 and 4265.757 which is not really convenient. Passing some of the standard plot arguments didn't help (in fact, nothing changed). In general, bubble plots are not good visual aid, except when you happen to have data for which they work well. They try to represent an additional dimention in 2-D, so there are bound to be problems if there is not enough space to do this on a plot; additionally the scale is not linear, or something else we are use to for comparing large differences (in case of your data). It may be better at times to just label the data points, and let the reader choose the interpretation, without representing relative size graphically. Please see a good book on Statistical Graphics. http://www.math.yorku.ca/SCS/Gallery/ Search: Cleveland, and Tufte. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] FW: R Reference Card and other help (especially useful for Newbies)
Anupam Tyagi AnupTyagi at yahoo.com writes: New users may also want to look at SciViews R Graphical User Interface(GUI). It can be a good learning tool. Its text based editor is basic compared to WinEdt with the R editing plug-in, or ESS and (X)Emacs combination. But it has point-and-click menus that help in writing code, and easy view of objects, etc can be very helpful for new users. Using this GUI may require you to install some R packages listed on the SciViews page. http://www.sciviews.org/SciViews-R/ A user may need to change the file target SciViews shortcuts points to. These are added to Windows Start menu. This is needed for SciViews to work with the intalled R version. Use start menu to go to menu item SciViews-R. Go to R Console. Right click. Go to last item in the list called properties. You will find something like the following in the Target field C:\Program Files\R\R-2.2.0\bin\Rgui.exe --sdi LANGUAGE=en RSciViews.RData note the C:\R-2.2.0\... It assumes that you have R-2.2.0 installaed in: C:\Program Files\R\R-2.2.0 If your R installation is R-2.2.1, and is installed in C:\Program Files\R\R-2.2.1 then you need to change the target of SciViews-R R console shortcut to: C:\Program Files\R\R-2.2.1\bin\Rgui.exe --sdi LANGUAGE=en RSciViews.RData note the change to: C:\R-2-2.1\... note the LANGUAGE=en for English language GUI. You may be able to change this to a language you want to use with R. See documentation for SciViews __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Insert R code in LaTeX document
Alexandre Depire depire at gmail.com writes:
Hello,
i would like to insert R code in LaTeX document.
I see something about the 'listings' package, but i would like if it is the
best way and if it is possible to use the command \include{programme.R}.
I have the following solution but it doesn't work with \include and \input
Following latex code worked for me. Anupam
\documentclass{report}
\usepackage{listings}
\begin{document}
Somethings .
\lstset{% general command to set parameter(s)
basicstyle=\small, % print whole in small
stringstyle=\ttfamily, % typewriter type for strings
numbers=left, % numbers on the left
numberstyle=\tiny, % Tiny numbers
stepnumber=2, % number every second line of code
numbersep=5pt, % 5pt seperation between numbering and code listing
language=R }
\lstinputlisting{text1.R}
\end{document}
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and provide commented, minimal, self-contained, reproducible code.
Re: [R] Any other R users in Philadelphia?
Mitchell Maltenfort mmalten at gmail.com writes: I'm still new to R and wouldn't mind meeting other R users, at any level of experience. This list is as good a place as any. Other is an R conference. There may also be some undergrads at economics dept at UPenn. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] FW: R Reference Card and other help (especially useful for Newbies)
New users may also want to look at SciViews R Graphical User Interface(GUI). It can be a good learning tool. Its text based editor is basic compared to WinEdt with the R editing plug-in, or ESS and (X)Emacs combination. But it has point-and-click menus that help in writing code, and easy view of objects, etc can be very helpful for new users. Using this GUI may require you to install some R packages listed on the SciViews page. http://www.sciviews.org/SciViews-R/ Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Reading fixed column format
Gabor Grothendieck ggrothendieck at gmail.com writes: C:\bincut -c2-3,6-8 a.dat 23678 23678 23678 Thanks. I think this will work. How do I redirect the output to a file on windows? Is there simple way to convert the cut command to a script on windows, because the entire command may not fit on one line? Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Reading fixed column format
Barry Rowlingson B.Rowlingson at lancaster.ac.uk writes: None of these seem to read non-coniguous variables from columns; or may be I am missing something. read.fwf is not meant for large files according to a post in the archives. Thanks for the pointers. I have read the R data input and output. Anupam. First up, how 'large' is your 'large ASCII file'? How many rows and columns? There are 356,112 records, and 326 variables. It has a fixed record length of 1283 positions, therefore cut -b can not be used. Secondly, what are 'non-contiguous' variables? When I do not want to read all columns. For example, I would like to read the following: StartingColumn VariableNameFieldLength 1 STATE 2 24 INTVID 3 27 DISPCODE 3 30 PSU 10 Sometimes I would also like to format the data after it has been read. For example, the ASCII file has price in columns 100 to 105 written as 005999. I want to read this and format it as 59.99 (omitting leading zeros in the price). Perhaps if you posted the first few lines and columns of the file then we might get an idea of how to read it in. I have not even downloaded the data onto my computer yet, because I am not sure I can read it in. The zipped file is 67MB. Using similar data a few years ago, I recall the unzipped file to be about 350--400 MB. I had used MySQL then, but it took some doing to get it in, and there were things that did not seem to work as I wanted them to---I could not figure out how to label the variables. I usually do not have to work with a dataframe of more than 10-30 MB at a time. It would be good to have a facility in R which defines the meta-data: labelling and structure of the dataset: positions of variables, their names, their lables, their levels (e.g. for ordered choice or group variables: yes, sometimes, no type responses). This can be saved as a seperate object and passed to a function that gets the named varibales from the ASCII file (names of variables to get can be given as arguments or as, attaches the meta data and creates a dataframe with all the meta-data attached. The meta-data of the dataframe could include notes at dataframe and variable level, and other information. This information is passed on to the plotting functions and used when formatting the output of statistical procedures. I agree with with Michael Kobovy that this is a very helpful list, and people do not owe less than what one paid for the software :) Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Gnuplot epslatex format also in R?
Prof Brian Ripley ripley at stats.ox.ac.uk writes: R has an xfig driver, and AFAIK you can do this from xfig. Is there an xfig port for Windows, without cygwin? If so, I will be thankful for a pointer to the where it can be downloaded from. I have been looking for it for some time. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] R-question
Thorsten Muehge MUEHGE at de.ibm.com writes: 1. Is it possible to query R files by SQL internally on data frames (not on a database) and how is the syntax (I have the RODBC package installed). It is possible to do similar things conceptually in R as in SQL---at least the basic SQL queries (I have not tried others). Unlike SQL, R retains the sort order. So far as I know you can not use SQL code to query R data-frames. But you can put SQL code in a .R file and use RODBC or ODBC (I have used this) to send SQL queries to database; you can also get the results from SQL queries back to R as R objects. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Reading fixed column format
Barry Rowlingson B.Rowlingson at lancaster.ac.uk writes: Or if I'd just read Duncan's message about negative widths in read.fwf. Anyway, I've learnt about readLines() and seek() and reading zip files now, so I can read _anything_ Thanks to everyone who answered my query. I have a lot to think about too. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Gnuplot epslatex format also in R?
Greg Snow Greg.Snow at intermountainmail.org writes: There is a Java based implementation called jfig at: http://tams-www.informatik.uni-hamburg.de/applets/jfig/ that works on windows. Hope this helps, Thanks. Is there also a port of xv? It can be useful for some graphical output. I tried Gimp on windows it did not do what I thought xv would have done fine. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Access Rows in a Data Frame by Row Name
I hope this helps. x - data.frame(a=1:5, b=6:10, d=11:15) x a b d 1 1 6 11 2 2 7 12 3 3 8 13 4 4 9 14 5 5 10 15 # access row with name a. This does not work. x$a [1] 1 2 3 4 5 # access column with name d x$d [1] 11 12 13 14 15 x$row.names NULL attributes(x) $names [1] a b d $row.names [1] 1 2 3 4 5 $class [1] data.frame x$row.names() Error: attempt to apply non-function row.names(x) [1] 1 2 3 4 5 # access first row by index x[1,] a b d 1 1 6 11 # access first row by name x[1,] a b d 1 1 6 11 # access second row by name x[2,] a b d 2 2 7 12 # change row names to alphabets. row.names(x) - c(a,b,c,d,e) row.names(x) [1] a b c d e # access second row by old name. Does not work because of name change. Why this does not give error: 2 row name does not exist? x[2,] a b d NA NA NA NA # access third row by name. x[c,] a b d c 3 8 13 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] inserting columns in the middle of a dataframe
I think it should be possible to create the column at the end and then use order on the columns names and indexes to only change the order of column indexes, rather than having to do operations on the data itself (which will be very time consuming if the dataset is large). Perhaps people with better R skills can suggest how to code this. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Dear FE Harrell How can I get rreport ?
justin bem justin_bem at yahoo.fr writes: Mr Harrell, After reading discussion about R output and SAS output , I will like to use rreport package. I a windows XP user Sincerly See: http://biostat.mc.vanderbilt.edu/twiki/bin/view/Main/Rreport Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] rename cols
Christos Hatzis christos at nuverabio.com writes: Try this: old.colnames - colnames(my.439.vars.df) old.colnames[old.colnames==fksm] - new.name.a old.colnames[old.colnames==klmk] - new.name.b For a newcomer, it will be useful to have a function like this in the base R: that can take a list of old.names and new.names, and do the assignment. It is far more efficient to have functions that are shared via the R distribution, than having to write own functions for carrying out basic data management tasks, and simple routinely used statistical procedures. Most users would rather spend time on thinking about the substantive work, instead of figuring out how to program---this may be specially true for new users. This way the functions used will also be more efficient and better designed than the typical new user. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Reading fixed column format
Jason Barnhart jasoncbarnhart at msn.com writes: These posts may be helpful. http://tolstoy.newcastle.edu.au/R/help/05/06/5776.html https://stat.ethz.ch/pipermail/r-help/2002-May/021145.html Using scan directly may also work for you rather than read.fwf. Also, there are posts regarding using other tools such a 'perl' or 'cut' to prepocess the data before reading with R. Searching the archives with those keywords should help. I new user should not have to learn perl,cut, awk, etc simply to be able to use R. Does not make sense to me. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Reading fixed column format
Barry Rowlingson B.Rowlingson at lancaster.ac.uk writes: None of these seem to read non-coniguous variables from columns; or may be I am missing something. read.fwf is not meant for large files according to a post in the archives. Thanks for the pointers. I have read the R data input and output. Anupam. First up, how 'large' is your 'large ASCII file'? How many rows and columns? There are 356,112 records, 326 variables, fixed record length of 1283 positions. Zipped file is 42MB. There are no field (variable) separaters (delimiters). Secondly, what are 'non-contiguous' variables? Variables that are not in adjoining positions in the file: reading them from the file would require skipping columns while reading. For example, below are the start positions of the first three variables I would like to read. StartingColumn VariableNameFieldLength 1 STATE 2 24 INTVID 3 30 PSU 10 Perhaps if you posted the first few lines and columns of the file then we might get an idea of how to read it in. Because a record (row) of the file is 1283 columns, I would not like to post it here. Thank you for your response. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Reading fixed column format
How can I read fixed column data (without a delimiter) from a large ASCII file directly into R? I want to read non-contiguous variables. I am trying to avoid reading it first into a DBMS and then choosing the variables. I would perfer to format and label it along while reading if possible. Something like what STATA does with dictionary. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Compress
How can I compress an R dataset so that it automatically chooses the optimal data type: byte, integer, long, float, etc? Something like compress command in Stata. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Reading fixed column format
Jason Barnhart jasoncbarnhart at msn.com writes: Not familiar w/ Stata, but these functions read data files and should provide the functionality you wish. ?read.fwf ?read.table ?scan None of these seem to read non-coniguous variables from columns; or may be I am missing something. read.fwf is not meant for large files according to a post in the archives. Thanks for the pointers. I have read the R data input and output. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] rename cols
Ethan Johnsons ethan.johnsons at gmail.com writes: A quick question please! How do you rename column names? i.e. V1 -- Apple; V2 -- Orange, etc. There are some nice utilities in Frank Harrell's Hmisc package. See: http://lib.stat.cmu.edu/S/Harrell/help/Hmisc/html/upData.html Also look at his Design library. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] rename cols
For a newcomer who wants to rename variable fksm and klmk in a dataframe of with 439 variables there is not easy and intuitive solution. That person has to spend a lot of time listing columns and counting columns or doing string searches or using brackets within brackets within brackets to get a simple thing done. Is there a simple function or solution to this in R without using an add-on package? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] reading and formating irregular time series for VaR
Hi, I am trying to read the following type of data from a .csv file to form an irregular time series object. I want to use it with the VaR package. How do I read it in correctly to an irregular time series object? Anupam. date,Open,High,Low,Close,Volume,OpenInterest,Contract 1972-08-16,54.25,54.25,54.25,54.25,1,1,KC1973H 1972-08-17,54.25,54.25,54.25,54.25,0,1,KC1973H 1972-08-18,54.25,54.25,54.25,54.25,0,1,KC1973H 1972-08-21,54.25,54.25,54.25,54.25,0,1,KC1973H 1972-08-22,54.25,54.25,54.25,54.25,0,1,KC1973H 1972-08-23,54.25,54.25,54.25,54.25,0,1,KC1973H __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Multiple matrix multiplication with two 3-dimensional arrays
Sophie Baillargeon Sophie.Baillargeon at mat.ulaval.ca writes: Maybe I could use an apply or something but I can't figure out how. I would have hoped that simply doing array1%*%array2 would work, but it doesnt I think one of the issues is that algebra for N-Dimentional arrays are not well defined. Think how would you define the above operartion on two 3x3x3 arrays. I had seen a paper a couple of years ago in some math journal that had proposed an algebra. I will be interested in knowing a reference to some source that defines 3-dimentional array algebra. Then perhaps it could be implemented in R. I will also be interested in knowing what is the equivalent of cell array in MATLAB in R---that is something that is equivalent to the cell functions in a spreadsheet---sometimes this can be useful. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] working with summarized data
One solution is to simulate the population by repeating each row weight number of times. This is inefficient. It may create a very large dataset for a large sample survey. But some of graphs and other things may turn out to your liking, depending upon how the functions are written. Anupam. Rick Bischoff wrote the following on 8/30/2006 7:57 PM: The data sets I am working with all have a weight variable--e.g., each row doesn't mean 1 observation. With that in mind, nearly all of the graphs and summary statistics are incorrect for my data, because they don't take into account the weight. For example median is incorrect, as the quantiles aren't calculated with weights: sum( weights[X median(X)] ) / sum(weights) This should be 0.5... of course it's not. Unfortunately, it seems that most(all?) of R's graphics and summary statistic functions don't take a weight or frequency argument. (Fortunately the models do...) Am I completely missing how to do this? One way would be to replicate each row proportional to the weight (e.g. if the weight was 4, we would 3 additional copies) but this will get prohibitive pretty quickly as the dataset grows. Thanks in advance! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Tables with Graphical Representations
First Graphic in the initial posting: I think this graphic need to be scaled in a manner so it can be interpreted correctly while going across rows, columns, and non-contguous cells, or the correct interpretation and way to read this provided. For example, in the last row one has to read the numbers to get the correct information out. I it will be good to have documentation that explains how to read/interpret this graph, otherwise fixed length boxes are visually confusing. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Antwort: Buying more computer for GLM
Please look at http://boinc.berkeley.edu/ Your problem seems to be similar to the ones for which BOINC is used. I am not sure how to do this with R, though. May be other people in this can help. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Grid Points
How do I put grid points (not grid lines) as the base layer of an xyplot? Is there a way to vary the interval at which x and y grid points are placed? Is it possible to start a graph so that Y axis begins at 500 and ends at 800? I am only interested in focusing on the relative distance between the points whose values are between 500 and 800, but not their relative distance from zero. Is there a way in R to draw two graphs so that that share the same X axis, but without the gap that mfrow() creates? The origin of the top graph should be where the Y-axis of the bottom graph ends. It will be useful for what I am trying to do to have the X axis of the top graph be invisible. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] split a y-axis to show data on different scales
I think information can be enhanced by using different scaled graphs next to each other. mfrow() created too much space, there may be no need to again draw the x-axis. It can be very useful to have different scales of the same data presented next to each other, in addition to the main graph. So I think the data of the person who started this thread could be displayed using one graph will all the data, and then a superimposed graph (sharing same x-axis) on any part of the data to give an enhanced visual communication. Drawing grid lines with same tick marks in both graphs can enhance this visual communication. This is like static zooming. Of course it is important to make sure that the change in scale is evident, because it is needed for the interpretation of the graph---using a grid with same tick marks can produce this effect visually. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Grid Points
Thanks. How do I retain the same scale of grid.points
from one panel to next even if the scale of the data
changes? For example: c(seq(601:700),seq(6510,7000,
by=10)) ~ seq(601:700) | gl(2,50).
--- Gabor Grothendieck [EMAIL PROTECTED]
wrote:
Try this. gl(2,50) is such that the first 50 points
are series 1
and the second 50 points are series 2. The scales=
argument
defines the positions of the tick marks and the
xlim= argument
defines the x axis limits. The layout puts the
panels on top
of each other rather than side by side. strip =
FALSE eliminates
the strip above each panel. type= says we want
lines. The
panel function puts points at the grid locations in
each panel
and then calls xyplot to plot the lines.
library(lattice)
library(grid)
x - 601:700
at - seq(500, 800, 50)
xyplot(x ~ x | gl(2, 50), scales = list(at = at),
xlim = c(500, 700),
layout = 1:2, strip = FALSE, type = l,
panel = function(...) {
grid.points(at, unit(rep(.01, length(at)),
npc),
pch = 20, size = unit(.2, char))
panel.xyplot(...)
})
On 8/20/06, Anupam Tyagi [EMAIL PROTECTED]
wrote:
How do I put grid points (not grid lines) as the
base layer of an xyplot?
Is there a way to vary the interval at which x and
y grid points are placed?
Is it possible to start a graph so that Y axis
begins at 500 and ends at 800? I
am only interested in focusing on the relative
distance between the points whose
values are between 500 and 800, but not their
relative distance from zero.
Is there a way in R to draw two graphs so that
that share the same X axis, but
without the gap that mfrow() creates? The origin
of the top graph should be
where the Y-axis of the bottom graph ends. It will
be useful for what I am
trying to do to have the X axis of the top graph
be invisible.
Anupam.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] split a y-axis to show data on different scales
Johannes Hüsing hannes at ruhrau.de writes: The pro's and con's of using scale breaks were discussed by Cleveland (1985) The Elements of Graphing Data (Wadsworth, pp. 85-91, 149). I don't know what Cleveland said about this is the second edition Spencer Graves: but I believe there are times when scale breaks are appropriate, but the display should make this nonstandard transition very clear; ... in which case you are close to having two graphs sharing an x-axis and therefore saving on ink (yay!). __ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. This is an interesting visual interpretation issue: it may be possible to shade the y-axis (which his thick like the top bars in Lattice plots), or shade the main graphing area from dark to light (or two shades, for two scales) to give a visual idea about the density or stretch of the space/scale on which the points are plotted. There is problems with this as well (interpretation of scale), but sometimes it may provide a better and quick visual communication. Is this possible in R? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Lattice package par.settings/trellis.par.settings questions
Please read about lattice.par.settings, and not trellis.par.settings. Trellis is in S/S-plus. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] large dataset!
JENNIFER HILL jh1030 at columbia.edu writes: Hi, I need to analyze data that has 3.5 million observations and about 60 variables and I was planning on using R to do this but I can't even seem to read in the data. It just freezes and ties up the whole system -- and this is on a Linux box purchased about 6 months ago on a dual-processor PC that was pretty much the top of the line. I've tried expanding R the memory limits but it doesn't help. I'll be hugely disappointed if I can't use R b/c I need to do build tailor-made models (multilevel and other complexities). My fall-back is the SPlus big data package but I'd rather avoid if anyone can provide a solution Thanks Jennifer Hill Dear Jennifer, you may want to look at the R newsletters. A few years ago it had an article on using DBMS with R, like MySQL, Oracle, etc. This is a frequently asked question: There are also some posts over the past few years that may be helpful. I have successfully read large database into MySQL, and accessed it from R---it was larger than your database. I hope that helps. Anupam Tyagi. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] www.r-project.org
Gabor Grothendieck ggrothendieck at gmail.com writes: Maybe a separate web site that shows R off or maybe just a pointer to the R Graph Gallery. I think the idea of a pointer to the R Graph Gallery is a better one than changing the current R website. I think that the main R web site should be accessible to as many users as possible, including those visually impaired. I hope EmacsSpeaks Statistics (ESS) people will appreciate this suggestion. I do like nice graphics and eye-candy. The other alternate could be an R-web site that is simple and easily accessible as simple mark-up text, which can be speech rendered. Anupam Tyagi. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] The beautiful math plot
Gesmann, Markus Markus.Gesmann at lloyds.com writes: See: ?image I would like to use this image in a publication. How do I get permission from the creater of this image? Anupam Tyagi. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] help in R
Anamika Chaudhuri canamika16 at yahoo.com writes: Hi, I cant understand where I am going wrong.Below is my code.I would really appreciate your help. Dear Anamika, to improve your chances to get a response from this list, and to help in people responde quickly and accurately to you, please run through your code line-by-line and identify the line/lines where the problem is: even better if you can broadly identify what the problem is. It will be difficult for someone to replicate your programming problem, without having your dataset, and knowing it's contents. Anupam. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
