Re: [R] reverse array indexing

Richard A. O'Keefe wrote: Jerome Asselin [EMAIL PROTECTED] suggests this: arr - array(rnorm(27),c(3,3,3)) dimarr - dim(arr) tmparr - array(1:prod(dimarr),dimarr) sapply(c(3),function(x,tmparr) which(tmparr==x,T),tmparr=tmparr)

Re: [R] Sorting a data frame

Hi! I think this is an important example! Is there a way to make it included in the help of order? Maybe a shortened version: # sorting a data frame df - data.frame(V1 = c(W,A, A, B, ), V2 = c(E, M, B, O, Q)) sorted - df[order(df$V1, df$V2), ] And a question: what to do to have the sorted

Re: [R] Write XML according to ggobi DTD

If case anyone else is interested, Duncan Temple Lang answered my question on the ggobi-help mailing list. The code he provided is pasted into the body of this email, below. It requires the the XML package (from http://www.stats.ox.ac.uk/pub/RWin/ for Windows and www.omegahat.org/RSXML/ for

[R] Problem with data.frames

Hi, I just encountered a problem in R that may easily be fixed: If one uses attach for a data.frame e.g. 1 times and forgets detach, then R gets incredibly slow (less then 10% of the original speed). My system: platform powerpc-apple-darwin6.0 arch powerpc os darwin6.0 system

[R] clear screen

Hi, with CTRL + L, I obtain a manual clear screen, is there also an analogous command to insert in a script? thanks in advance. Paolo __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help

[R] help with graphics

I'd like to use lattice to make graphics under conditional structure like : if (TRUE) { barchart() dev.print(png, file = image1.png, width = 600) } but there's nothing in the output file. It seems that it's too long to print graphic into the graphical output and the saved file is a blank

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[R] R on Solaris 9

I am attempting an install of R-1.7.1 on a Sun Solaris 9 box. It is a V880. It has 8 processors at 950MHz each and 32 Gb of physical memory. I can './configure' and after, I get the following: R is now

[R] RFE implemented?

Hi, is there an implementation of RFE (recursive feature elimination; see e.g. Guyon et al. 2002, Furlanello et al. 2003) existing in R? Thanks for your help! Regards Michael -- Michael T. Mader Institute for Bioinformatics/MIPS, GSF Ingolstaedter Landstrasse 1 D-80937 Neuherberg

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Re: [R] how as.numeric() !- factor

The problem is that the 2nd column in your data frame has been converted into a factor. This happened because you used cbind() with mixed character and numeric vectors. cbind() with these types of arguments will construct a character matrix. Then when you passed that character matrix to

[R] problem with summary in survival analysis

hi, i tried to make an survival analysis with survfit, but i have a problem when i use the command summary. i receive this error message when i have numerous data( 500): Error in as.matrix(x) : (subscript) logical subscript too long how can i see the standard result ? thank in advance.

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[R] Trouble with optim

Dear All; Searching on the achieve, many questions on optim() have been asked, but I haven't seen the following. The question began with my original inquiry on Optimization failed in fitting mixture 3-parameter Weibul l distribution using fitdistr() which I posted on Jul. 28,

Re: [R] Alignment when rotating text and symbols

Thank you for this, infact I have just discovered that adj is much more predictable and does what I want. I still remain surprised that when I rotate some text 180 degrees I do not get an upside down version of the unrotated text relative to the point. As the reasons for this are clear to

Re: [R] Alignment when rotating text and symbols

On Tuesday, July 29, 2003, at 01:04 pm, Prof Brian Ripley wrote: What have I done wrong? In addition, on my screen, the arrow symbols do not rotate at all although they do on the pdf image. (R version 1.71, MacOS X 10.2.6) *WHICH* Mac port of R? There are two! The lack of rotation is a

[R] anova

I am totally confused as to how to use anova. I have three vectors and would like to use anova on them but I don't understand how lm or glm comes into play. In matlab, you just give the three vectors. Why isn't it the same in R? Any help would be greatly appreciated. Anna

[R] (no subject)

Hello, My question is very simple. I have installed R from the internet and I want to use it to analyse my data set. It seems that R is not able to make the connection when I use the read.table () function since it probably doesn't know where is the required file. Where am I suppose to save my

Re: [R] timezones

I share your concerns regarding Problems 1 and 2. However, I am unable to provide help on those at this moment. As for Problem 3, an alternative for the time being would be to use another package such as chron or date, although it would be preferable to use the classes of the base package if

[R] Problem with data.frame and attach

Hi, I just encountered a problem in R that may easily be fixed: If one uses attach for a data.frame e.g. 1 times and forgets detach, then R gets incredibly slow (less then 10% of the original speed). My system: platform powerpc-apple-darwin6.0 arch powerpc os darwin6.0 system

[R] spatial statistics vs. spatial econometrics

Dear R users, I am putting together reading and resources lists for spatial statistics and spatial econometrics and am looking for some pointers from more experienced practitioners. In particular, I find two camps in spatial modelling, and am wondering which approach is better suitied to which

[R] gls function

Dear all I use the gls function but in contrast to the lm function in which when I type summary(lm(...))$coef I receive all the coefficients (estimate, Std. Error, t-value and pvalue), with gls when I type summary(gls(...))$coef I only receive the estimate of the reg. coefficient without

[R] help with tapply and weighted.mean

Hello! I have data frame with 'weights' in one of the columns. I need to compute weighted mean on another column other factor variable and i am trying to: res-tapply(data$k,list(data$model),weighted.mean,w=data$w,na.rm=T) and i get: Warning messages: 1: longer object length is not a

[R] Error in par

Hi, I make a function and it work, but I get a error message in the follow step: image.plot(zlim = c(0,216),legend.width=0.2,legend.only=T, horizontal=T,col=palette(),nlevel=nivcor,offset=0.7, legend.shrink=1) The error is: Error in par(old.par) : invalid value

[R] Problems installing R on Windows XP

Dear all, I run a IBM PC compatible with a Pentium IV with 2,4 MHz and 512 Mb RAM and a 80 Gb fast disk und Windows XP home edition. I downloaded rw1071.exe from cran.at and cran twice. When I tried to open rw1071.exe I choose the option to install all R reference materials as well and then

[R] R 1.7.1 arima0 problem

Hi, I'm trying to go through the examples for function arima0() in ts package, i.e, data(lh) arima0(lh, order = c(1,0,0)) each time the call to arima0() causes a segmentation fault. I checked the earlier version (1.1.1) of R, the function arima0 works fine. Tracing the call indicates that the

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[R] how to make a plot without any axis-labeling

Hi. I got a problem, perhaps someone can help me... every time, when I want to plot data, both axis are labeled by default like data[1,] and data[2,] how can I make a plot without ANY labeling? does anyone know that? thanks for helping Michael [[alternative HTML version

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[R] Random numbers

Thank you to all who helped me with the generation of random numbers. I have read much and learned even more. I even found some code that I have translated into java and am getting seemingly random output. :) I was wondering if there were any libraries for R which test the 'randomness' of the

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[R] kernel density in 2D

Has anyone written code in R to do kernel density estimation in 2-D with sphered data? In other words: 1. Transform the data to have unit covariance matrix. 2. Use one of the 2-D kernel estimators in R (e.g., kde2d, bkde2D, sm.density...) to obtain fhat(x). 3. Transform back to the original

[R] Extracting p-values from modeling

To whom it may concern, I have figured out an indirect means of extracting the p-value from a conditional logistic regression (clr) run. I was able to extract the log-likelihood for the model, both with and without covariates. Twice that difference is the chisq for the clr, and then using

[R] value replacement in matrices

Hello R users I would like to ask if anyone knows a computationally fast solution to this problem: I have an original matrix and an index matrix. The original matrix is ca 4000x4000 cells, and the index matrix has 261 unique values. From these, I want to produce a new matrix. Consider the

[R] how to make a plot without any axis-labeling

Hi. I got a problem, perhaps someone can help me... every time, when I want to plot data, both axis are labeled by default like data[1,] and data[2,] how can I make a plot without ANY labeling? does anyone know that? thanks for helping Michael

Re: [R] timezones

Hi Gabor, I believe I have an answer to your first two inquiries. Both have something to do with the daylight vs. standard times. If I understand correctly, GMT has only standard time. Consider this example. (now - Sys.time()) [1] 2003-08-01 15:03:38 PDT (now.gmt - as.POSIXlt(now,tz=GMT))

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[R] shading in image()

Is there a way to make a shading interpolation on an image plot? Something similar to matlab 'shading interp', I think it is called Gouraud shading. What I want is to make a image plot look nicer. with image() it looks very facetted, and I would like to make it look smoother. I've tried with

[R] how to make a plot without any axis-labeling

compare plot(rnorm(1:10),rnorm(1:10)) with plot(rnorm(1:10),rnorm(1:10),xlab=,ylab=) cheers __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help

[R] RSPerl help

Hi, I have installed RSPerl and tried to run the test.pl that comes along with the RSPerl source. The program quits complaining 'Fatal error: R home directory is not defines'. Any help appreciated. thanks, suresh __ [EMAIL PROTECTED] mailing list

[R] Re: [S] subscripts error

Hi Gianluca: try : x2-x[1:(length(x)-2)]-x[3:length(x)] OR x2-diff(x,lag=2) Hope it helps. Gianluca wrote: Hi all, I'm back to use S-Plus after a lot programming with SAS, so it's hard for me to face many simple problems Let's come to what is going to make me crazy. I have a simple 1000

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[R] ncp t Fortran error power of some tests

Hi everybody, I have three questions to ask us: a) R incorporates a function for the Non-central T distribution which unfortunately and, as you know, is not available in Splus 4.5. In http://www.stats.ox.ac.uk/pub/Swin I found the Don MacQueen´s noncent.zip but when I run it in Splus 4.5 the

[R] index all subsets of k of m items?

How can I efficiently index all choose(m, k) subsets of m items taken k at a time? For example, with (m, k) = (3, 2), the subsets are (1, 2), (1, 3), and (2, 3). I'd like a function something like index.subsets(subset, k, m) that would return 1, 2 or 3 for these 3 subsets. Examples:

[R] How to speed the shut down of the graphic device

hello, I use R1.7.1 under winXP and I am running the following script example : for (i in 1:10) { x - rnorm(100) png( paste(D:/essai,i,.png,sep=)) plot(x) t1 - Sys.time() dev.off() t2 - Sys.time() print(t2-t1) } at each step, it takes

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[R] 'format' problem

Dear R experts, format(12345678, digits = 2) gives [1] 1.2e+07 while format(1234567, digits = 2) gives [1] 1234567 but I'd like the last number to be represented as 1.2e+06 string too. Where am I wrong? Thanks, Timur. __ [EMAIL PROTECTED]

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[R] Extracting p-values from modeling

Hello, I have being conducting some (conditional logistic) regressions (clr), and I'm interested in extracting and manipulating (as a number) the p-values. (This is a prelude to some power simulations, where I'll generate data sets, perform a clr on each data set, and then extract the

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Re: [R] Sorting a data frame

On Thu, 31 Jul 2003, BORGULYA Gábor wrote: I think this is an important example! Is there a way to make it included in the help of order? Please explain why it adds to what is already there, which looks very similar to me. Maybe a shortened version: # sorting a data frame df -

Re: [R] clear screen

On Thu, 31 Jul 2003, Paolo Covelli wrote: with CTRL + L, I obtain a manual clear screen, not necessarily: what OS is this and what GUI, if any? is there also an analogous command to insert in a script? What does outputting Ctrl-L (via cat(\015)) do? -- Brian D. Ripley,

[R] install.packages (newbie?) error

I recently installed R 1.7.1 on Mac OS 10.2.6, and I now need to install the akima package. When I use install.packages(akima) or any variation of that command, I get the following message: Error: couldn't find function install.packages (I haven't had any problems with other commands so far,

Re: [R] Excel can do what R can't?????

I've found that the discussions are interesting, generally speaking, peoples seem equally confident on R's optim/nlm and Excel's solver. The authors of the algorithm GRG2 (Generalized Reduced Gradient) are not cited in the documentation of optim(), so I'm wondering if the optimization algorithm

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Re: [R] help with graphics

Dear Erwan, Did you have a dev.off() somewhere after barchart? Otherwise you never know what you might get in the png file. Regards, Andrew C. Ward CAPE Centre Department of Chemical Engineering The University of Queensland Brisbane Qld 4072 Australia [EMAIL PROTECTED] Quoting Erwan BARRET

Re: [R] history for graphics

Dear Erwan, Perhaps there is a way to do this. I typically use the following sequence, however: for (i in 1:10) { postscript(file=paste(blah, i, .ps, sep=)) barchart(...) dev.off() } Regards, Andrew C. Ward CAPE Centre Department of Chemical Engineering The University

Re: [R] (no subject)

Would you mind giving a few more details on what you've tried? It's hard to provide much of an answer otherwise. You can save your text file anywhere on your network, and then try temp.df - read.table(c:/temp.dat, header=TRUE) Regards, Andrew C. Ward CAPE Centre Department of Chemical

Re: [R] Problems installing R on Windows XP

Dear Kurt, I'd wait a day or so and try again. Lots of users have downloaded R from these sites, so there was probably just some glitch somewhere that affected you. Regards, Andrew C. Ward CAPE Centre Department of Chemical Engineering The University of Queensland Brisbane Qld 4072 Australia

Re: [R] history for graphics

On Windows, read the README.rw10xx! (READMEs and FAQs are meant to be read, especially before posting requests for help.) On Thu, 31 Jul 2003, Erwan BARRET wrote: I've seen that there's an history for graphics. How can I save it manually? Yes: see the history menu and ?savePlot. Can I

Re: [R] how to make a plot without any axis-labeling

Dear Michael, If you want no axes at all, try plot(1:10, 1:10, axes=FALSE) To omit ticks and tick labels try plot(1:10, 1:10, xaxt=n, yaxt=n) To omit axis labels try plot(1:10, 1:10, xlab=, ylab=) Regards, Andrew C. Ward CAPE Centre Department of Chemical Engineering The University

[R] Feedback Bootstrapping

Dear experienced R-users, I am having some probably trivial trouble estimating the confidence interval for the difference of two group means, with groups been of unequal sample size. I am using the Bootstrap package and the function bcanon(bcanon(x, nboot, theta, ...,alpha=c(0.025, 0.05, 0.1,

Re: [R] help with tapply and weighted.mean

On Thu, 31 Jul 2003 22:00:13 +0400 Kosenkov Kirill [EMAIL PROTECTED] wrote: Hello! I have data frame with 'weights' in one of the columns. I need to compute weighted mean on another column other factor variable and i am trying to:

[R] na.action in randomForest

The help page for randomForest shows na.action=na.fail as a parameter, and does not describe other possibilities for na.action. I have a regression problem, with about 1000 rows in my data frame, and with an NA in occasional predictor variables, in about 5% of rows. I would like to have all rows

[R] behavior of weights in nnet's multinom()

I see that case weights can be optioned in multinom(). I wanted to make sure I understand what weights= is expecting. My weights (not really mine but I'm stuck with them) are noninteger, are not scaled to sum to the sample size, and larger weights are intended to increase influence. The

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[R] Timezones

Thanks to Jerome Asselin (jerome at hivnet.ubc.ca) and Patrick Connolly (p.connolly at hortresearch.co.nz) for your work on this problem. We collectively were able to find two bugs, made easier by using our three different machines over 3 different time zones. See the following for details:

Re: [R] how to make a plot without any axis-labeling

?plot On Fri, 1 Aug 2003, Michael Kirschbaum wrote: Date: Fri, 1 Aug 2003 00:22:09 +0200 From: Michael Kirschbaum [EMAIL PROTECTED] To: R-Help [EMAIL PROTECTED] Subject: [R] how to make a plot without any axis-labeling Hi. I got a problem, perhaps someone can help me... every

Re: [R] timezones

Part of the problem is that 'now' is POSIXct and 'now.gmt' is POSIXlt. If you use as.POSIXct, you get the right answer. (now - Sys.time()) [1] 2003-08-03 18:29:38 EDT str(now) `POSIXct', format: chr 2003-08-03 18:29:38 (now.gmt - as.POSIXlt(now,tz=GMT)) [1] 2003-08-03 22:29:38 GMT

Re: [R] Problem with data.frames

Andreas Eckner [EMAIL PROTECTED] writes: Hi, I just encountered a problem in R that may easily be fixed: If one uses attach for a data.frame e.g. 1 times and forgets detach, then R gets incredibly slow (less then 10% of the original speed). R also gets incredibly slow if you create

Re: [R] How to speed the shut down of the graphic device

Dear Philippe, Perhaps you could try a different graphics device (maybe postscript). On my machine, the time differences were all 1 second rather than the 3 you reported. If 300s is really too long for you, you could get a new computer or run your script on a faster one. Andrew C. Ward CAPE

Re: [R] 'format' problem

Dear Timur, sprintf may be what you want: sprintf(%.1e, 12345678) sprintf(%.1e, 1234567) Regards, Andrew C. Ward CAPE Centre Department of Chemical Engineering The University of Queensland Brisbane Qld 4072 Australia [EMAIL PROTECTED] Quoting Timur Elzhov [EMAIL PROTECTED]: Dear R

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