[R] plot portion of a line
Dear HelpeRs, Given: x - rnorm(50) y - rnorm(50) plot(x,y) abline(lm(x ~ y)) Is there a way to plot just a portion of the line? Say for values of x 2.0 or x -2.0 and x 4.0. (Still fitting all the points.) Thank you, jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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 editor vs. Tinn-R
On 1/12/07, Martin Becker [EMAIL PROTECTED] wrote: Depending on which button you press in Tinn-R, the clipboard is used to transfer the commands to R, so sometimes you can't rely on the previous contents of the clipboard while using Tinn-R. If you use the (source)-versions of the buttons, the content of the clipboard should be preserved. Something odd is going on. I can confirm that read.delim(clipboard) works from R, but not from Tinn-R. What seems odd is that the contents of the clipboard _are_ preserved after the Tinn-R send, so that a subsequent paste or read.delim(clipboard) from R works correctly. Perhaps Tinn-R restores the contents of the clipboard after sending to R such that the R command runs before the restore takes place? jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] get.hist.quote
Odd behavior from get.hist.quote this AM.
get.hist.quote('sunw')
trying URL
'http://chart.yahoo.com/table.csv?s=sunwa=0b=02c=1991d=0e=03f=2007g=dq=qy=0z=sunwx=.csv'
Content type 'text/csv' length unknown
opened URL
.. .. .. .. ..
.. .. .. .. ..
.. .. .. .. ..
.. .. .. .
downloaded 189Kb
Error in if (!quiet dat[n] != start) cat(format(dat[n], time
series starts %Y-%m-%d\n)) :
missing value where TRUE/FALSE needed
Indentical for 2.4.0 on SuSE 10.1 and 2.4.1 on Win XP.
jab
--
John Bollinger, CFA, CMT
www.BollingerBands.com
If you advance far enough, you arrive at the beginning.
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Re: [R] get.hist.quote
On 1/4/07, BBands [EMAIL PROTECTED] wrote: Odd behavior from get.hist.quote this AM. Now working, must have been a Yahoo! issue. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Does SQL group by have a heavy duty equivalent in R
On 1/1/07, Prof Brian Ripley [EMAIL PROTECTED] wrote: And it works perfectly well with RODBC, so you don't need yet another package. RODBC even comes with SQLite examples. Thanks, I hadn't thought of that and it should simplify things as we are already using RODBC for MySQL. BTW, 'fast' is rather misleading: SQLite is often fast for small tasks, but can be very slow compared to a more serious DBMS. Agreed. We switch to MySQL for larger jobs. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Does SQL group by have a heavy duty equivalent in R
On 12/30/06, Farrel Buchinsky [EMAIL PROTECTED] wrote: Instead I used RODBC sqlSave(channel,RawSeq) to push the table into a Microsoft Access database Then a sql query, courtesy of the Microsoft Access Query Wizard a la design mode. If SQL does prove to be part of your approach you might want to have a look at SQLite. Dirk introduced it to me back when we worked on Crusher. We use it for development and some production work. Main attributes: simple, fast and light weight. Everything you for R need here: http://cran.r-project.org/src/contrib/Descriptions/RSQLite.html SQLite's home page: http://www.sqlite.org/ And a Python connector: http://initd.org/tracker/pysqlite jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] OT: any recommendation for scripting language
On 12/30/06, Wensui Liu [EMAIL PROTECTED] wrote: Dear Experts, Thank you so much for your opinions. I probably will go with python. Following your suggestion, I started reading some tutorials but have a quick question. In the sense of statistical computing, is there anything that can be easily done with python but not with SAS/R? Could you please give such an example? I gather that just about anything can be done in R and have seen some pretty amazing examples, but I come from the right tool for the job school as contrasted to the when you have a hammer everything begins to look like a nail school. As a consequence I tend to use R for statistics, SQL for database management, gnuplot for graphics and Python for general programming and glue... A lot of that has to do with the order in which I learned the tools, for example I am much faster/more productive with gnuplot than with R graphics, but that gap is narrowing as I climb R's grade. jab--not an expert, just a traveller -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] how to suppress a loading required package: ... message
On 12/27/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi, how to suppress a loading required package:... message? require(package, quiet=TRUE) jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] stacked plots
On 12/27/06, Dirk Eddelbuettel [EMAIL PROTECTED] wrote: Do you remember the bollingerBands example we worked on a few years ago and that is still at Romain's incredible R Graph Gallery at http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=65 It uses layout, you can also use the simpler par(mfrow=...) approach *if* you also reduce bottom and top spacing accordingly as e.g. in the plot functions in the script referenced above. I do indeed remember that, it was a nice piece of work that I learned a lot from. At the time you mentioned there were some newer methods in the works that might serve better, which prompted my question after an appropriate delay. ;-) jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] OT: any recommendation for scripting language
On 12/23/06, Wensui Liu [EMAIL PROTECTED] wrote: if you recommend one, I will really appreciate it if you could point out a good source for learning as well. We have found Python to be the perfect choice for our work. Python is a high-level, cross-platform language that is easy to learn/write with an extensive set of libraries. It supports object and procedural programming styles equally well, so one may match the style to the task. If is also an excellent 'glue' language, easily tying together diverse programs in various environments. There is great connectivity with R though rpy and RSpython. Here are links to some of the connectors we use: R http://rpy.sourceforge.net/ http://www.omegahat.org/RSPython/ Database http://sourceforge.net/projects/mysql-python http://www.initd.org/tracker/pysqlite Graphics http://gnuplot-py.sourceforge.net/ Windows--COM, DDE... http://sourceforge.net/projects/pywin32/ The Python tutorial is the place to start: http://docs.python.org/tut/ jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Install R in Linux
On 12/13/06, lu kan [EMAIL PROTECTED] wrote: Hi, Is it possible to install R in a linux box (Debian) without being a root. I know I can compile the R source code, but there is no F77 compiler on the box. So is it possible to install binary R without being a root? If you can get the F77 compiler installed you can configure, make, test and run R from its bin directory without being root. I did this last night on a SuSE box with 2.4.0 prior to doing a final make install as root. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Book recommendation for newbie to stats and R?
On 10/17/06, Zembower, Kevin [EMAIL PROTECTED] wrote: I work for an organization that analyses behavior change communication programs regarding HIV/AIDS and reproductive health. A typical question we're trying to answer is, Watching which television programs in South Africa is related to an increased use of condoms? All of our work is in the social sciences, I'd say. I'd like to help analyze our data using R. I recently bought Peter Dalgaard's book and have found it to be quite helpful. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] cluster in R
On 10/17/06, Weiwei Shi [EMAIL PROTECTED] wrote: is there some good summary on clustering methods in R? It seems there are many packages involving it. Gabor provided this very useful link a couple of days back. http://cran.r-project.org/src/contrib/Views/Cluster.html jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Block comments in R?
Apparently misunderstanding me, On 10/8/06, Richard A. O'Keefe [EMAIL PROTECTED] wrote: Amongst other things, it should NOT acquire misfeatures in order to support editors that happen not to support comment-region. ... One can only comment from one's experience. We have found the concept of inline documentation, and block comments in specific, to be very valuable in our work. Indeed I cannot think of a problem caused by this practice, but I can think of many problems caused by the absence of such practice. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Block comments in R?
And of course vim, emacs, nedit, tinn-r... Should R be editor specific? Or should it be editor neutral? In my view blocks comments are a desirable, editor-neutral approach. Note that most of the more recent languages have some form of block comment capability. http://en.wikipedia.org/wiki/Comment#Summary jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Block comments in R?
+1 for Python style comments. your comments here and some more ... and some related info jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] a decimal aligned column
As requested:
The alignment problem came from calling format many times. Marc
Schwartz suggested a solution of putting my results in a vector and
then formatting. As I understand it the problem is that fixed-width
fields are only available from sprintf, while comma delineation is
only available from format, formatC and prettyNum. The
interrelationships are complicated (format calls prettyNum) and
require _very_ careful study. Here is Marc's solution with a few
changes. It left aligns the symbols and truncates, right aligns and
comma delineates the numbers. In short you get a nice table that is
easy to scan.
If I had one wish for format, it would be that it could set fixed
field width as well as minimum.
library(tseries)
# the symbols
symbols - c('spy', 'ise', 'oih', 'mot', 'pbj', '')
# set the start date to a year ago
Start - Sys.Date() - 366
# Pre-allocate dolVol as a vector
dolVol - numeric(length(symbols))
# Now get the values, assign to dolVol by indexing
for(line in seq(along = symbols))
{
a - get.hist.quote(instrument=symbols[line], start=Start,
compression=w, quote=c(Close, Volume),
quiet=TRUE)
dolVol[line] - mean(a[,1]) * mean(a[,2])
}
# Now for the initial common formatting,
# truncating the dolVol values to whole numbers
dolVol.pretty - format(trunc(dolVol), big.mark=,, scientific=FALSE,
justify=right, width=15)
# Now output
cat(paste(sprintf('%-4s',symbols), dolVol.pretty,
collapse = \n, sep = ), \n)
spy 8,770,399,023
ise 21,296,087
oih 1,415,206,983
mot416,923,148
pbj246,700
4,077,543,493
jab
--
John Bollinger, CFA, CMT
www.BollingerBands.com
If you advance far enough, you arrive at the beginning.
__
R-help@stat.math.ethz.ch mailing list
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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] a decimal aligned column
Many thanks to Marc Schwartz who helped me work through this problem in a series of off list exchanges. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] a decimal aligned column
Hello, For numbers in the range 100 to 100,000,000 I'd like to decimal align a right-justified comma-delineated column of numbers, but I haven't been able to work out the proper format statement. format(num, justify=right, width=15, big.mark=,) gets me close, but numbers larger than 1,000,000 project a digit beyond the right edge of the column, which I really don't understand. I gather I can get the decimal alignment from sprintf(), but I am not sure about the interaction of the two functions. TIA, jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Command area in SciViews 0.8.9 - second try
On 9/21/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: (i) the command area at the bottom cannot be found (ii) the regular R window cannot be minimized/maximized anymore. I cannot duplicate these problems with R 2.3.1, SciViews 0.8-9, Win XP(current). jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] plot correlation matrix
On 9/21/06, Earl F. Glynn [EMAIL PROTECTED] wrote: Which function was used to produce this plot? library(ellipse) ?plotcorr Look at the third example for the color plot. That's pretty nice. I have been using symnum(). Are there any other neat visualisations for correlation matrices? jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] currency or stock trading strategy
On 9/17/06, Darren Weber [EMAIL PROTECTED] wrote: Hi, are there any good charting and analysis tools for use with currencies, stocks, etc. in R? I have some tools to download currency data from the NYFRB using python and XML. Can we get and parse an XML download using R? Can we have interaction in R plots? Does anyone use R for back-testing trading strategies? Are there any forums for discussion of using R for this specific purpose (apart from this general list)? Is anyone aware of any general open-source developments for these purposes (I don't see any from GNU or google searches)? Take care, Darren I hardly know where to start either. I use R, Python, rpy, gnuplot-py and gnuplot together and am very happy with the result. I find that each piece has it own strengths and together they provide a very powerful solution. I am currently working on integrating TA-lib into this mix via a project started by Andrea Malagoli--see the r-sig-finance archives. http://rpy.sourceforge.net/ http://www.gnuplot.info/ http://gnuplot-py.sourceforge.net/ http://ta-lib.org/ jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Connecting to R using Perl?
On 9/8/06, Ffenics [EMAIL PROTECTED] wrote: Hi there Can anyone tell me please if I can access R though a perl script? http://www.omegahat.org/RSPerl/ And there is always: http://rpy.sourceforge.net/ jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] Connecting to a SQLBASE database with R
for RODBC you must make a connection SQLBASE first: For XP: control panel Admin tools Data sources Add... You may have to install the SQLBASE ODBC driver first if it is not on the list. The rest should be easy just supply the connection name and details to RODBC. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] .Rprofile under Windoze.
On 8/30/06, Rolf Turner [EMAIL PROTECTED] wrote: I am (for my sins) having to do some work using R under Windoze. I wanted to set up a .Rprofile to control my set-up. The docs on .Rprofile say that it can/should be placed in ``the user's home directory''. ``An Introduction to R'' observes lucidly that this concept needs to be clarified under Windoze. Saving .Rprofile to the R root directory works for me. On my system that is C:\Program Files\R\R-2.3.1\ jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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] .Rprofile under Windoze.
And... If you have/use shortcuts to R, you may also save an .Rprofile to whatever directory you name in the Start in: field of the shortcut. This allows one to have many profiles. jab -- John Bollinger, CFA, CMT www.BollingerBands.com If you advance far enough, you arrive at the beginning. __ 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 namees
R 2.3.1
I wrote a little script to do some cross correlations. The symbols are
in a text file like so:
symbols.txt
ibm
dd
csco
require(tseries)
symbols - scan(symbols.txt, what = 'character')
for(line in 1:(length(symbols)-1)) {
assign(symbols[line], get.hist.quote(instrument = symbols[line],
start = 2005-09-01, quote = Close))
}
# this results in objects ibm, dd... with the last symbol skipped
mat - cbind(symbols) # this is the problem
(cor_mat - cor(mat))
symnum(cor_mat)
How can I pass a list of the objects to cbind()? As written cbind gets
only the names of the objects and binds the names not the objects.
Thanks in advance,
jab
--
John Bollinger, CFA, CMT
www.BollingerBands.com
If you advance far enough, you arrive at the beginning.
__
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.
