similar to: A programming puzzler

I am using read.spss in the foreign package to read an SPSS save file. For date variables I get huge values such as 11489990400. Does anyone know how to convert these values to R POSIXct date objects? Thanks in advance -Frank platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor

In a .First.lib I want to issue two require()s to insure that two other packages are loaded. But I want the package being loaded by .First.lib using library.dynam("mypackage",pkb,lib) to be higher in the search order than the two required packages, because I want to have a couple of functions from the two required packages overridden. What is the best way to do that? Thanks in advance

Full_Name: Frank Harrell Version: 1.6.1 OS: RedHat 8.0 Linux Submission from: (NULL) (128.143.108.90) I get an error when trying to load a URL that contains a file that was saved using save(object, compress=TRUE): > load('http://hesweb1.med.virginia.edu/biostat/s/data/sav/kprats.sav') Error in gzfile(file, "rb") : unable to open connection In addition: Warning message:

The Design library has been fully ported to R except for Cox proportional hazards regression modeling (using Therneau's survival package) which will be available in about two weeks. It will take much longer to make all the example code executable, is it currently contains many examples for which data are not provided. Thanks to Xiao Gang Fan <xiao.gang.fan1 at libertysurf.fr> who

The Design library has been fully ported to R except for Cox proportional hazards regression modeling (using Therneau's survival package) which will be available in about two weeks. It will take much longer to make all the example code executable, is it currently contains many examples for which data are not provided. Thanks to Xiao Gang Fan <xiao.gang.fan1 at libertysurf.fr> who

If anyone has a very fast vectorized method for doing the following I would appreciate some help. I want to avoid outer() to limit memory problems for very large n. Let x = real vector of length n y = real vector of length n w = real vector of length m, m typically less than n/2 but can be > n z = real vector of length m For w[i], i=1,,,m, find the value of x that is closest to w[i]. In

Even though the FDA has no policies at all that limit our choices of statistical software, there is one defacto standard in place: reliance of the SAS transport file format for data submission (even though this format is deficient for this purpose, e.g., it does not even document value labels or units of measurement in a self-contained way). Because of the widespread use of SAS transport files in

I am unclear on whether to run R CMD check pgkname as user or as root on Linux. When running as user, after all the latex, html, and man files are created, I get the following error message: Rdconv(): Couldn't open '': Permission denied Has anyone dealt with that message? When I run R CMD check a second time, all latex, html, etc. are recreated which takes quite a while. Is there

Under platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 5.1 year 2002 month 06 day 17 language R I am having the following problem. d <- Sys.time() w <- data.frame(d)

In S-Plus the ... argument for tapply is before simplify. In R (1.2.3) ... is after simplify, causing the user to have to specify simplify every time ... is used even though the default is usually OK. Unless there was a benefit to reordering the arguments, it might be a good idea to reconsider the current function definition. ... is probably used more than simplify (e.g., tapply(rainfall,

On Mon, 16 Jun 2003 09:56:07 +0200 Patrick Hausmann <p.hausmann at mr-regionalberatung.de> wrote: > Dear Frank, > > I can reproduce the problem from Philippe Glaziou (see attachment). > Maybe this can help. > Best, > Patrick > > Am Wollelager 11 > 27749 Delmenhorst > Tel. 04221 96373-0 > Fax 04221 96373-29 > > http://www.mr-regionalberatung.de >

In platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 7.1 year 2003 month 06 day 16 language R I get > sort(c(3,1,NA)) [1] 1 3 Shouldn't NAs be retained by default? Thanks -Frank ---

Dear R Developers, I should have had the Design library running in R by now but have kept putting off changing some calls to LINPACK routines to use those builtin to R. Specifically I call dqrsl1 and dqr. Would it be an easy task to put those in the next release of R? If not I'll finally bite the bullet and get back into reading LINPACK documentation (which I have but haven't examined

Using R CMD INSTALL packagename.tar.gz on platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 6.1 year 2002 month 11 day 01 language R I used to get html and latex files recreated only when the source .Rd file changed. Now I am getting html and latex (and text and example) recreated whenever I run R CMD INSTALL when I do

Using R CMD INSTALL packagename.tar.gz on platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 6.1 year 2002 month 11 day 01 language R I used to get html and latex files recreated only when the source .Rd file changed. Now I am getting html and latex (and text and example) recreated whenever I run R CMD INSTALL when I do

Hello R-user I want to compute a multiple regression but I would to include a check for collinearity of the variables. Therefore I would like to use a ridge regression. I tried lm.ridge() but I don't know yet how to get p-values (single Pr() and p of the whole model) out of this model. Can anybody tell me how to get a similar output like the summary(lm(...)) output? Or if there is

Thanks to Deepayan Sarkar (lattice) and Paul Murrell (grid) I have nearly finished porting the Hmisc library's xYplot function to R. xYplot extends xyplot to allow for error bars, bands, and a few other features. In S-Plus I extended the Trellis function xyplot mainly by writing panel.xYplot. In R, xyplot contains a lot of code, so I implemented xYplot by calling xyplot from it. Things are

Does anyone have something like tapply that is extremely fast for matrices when there is a very large number of levels of the grouping variable? I'm referring to, for example, tapply(x, grouping.variable, function.operating.on.submatrix) where x is a matrix and the submatrix is a subset of the rows of x. The grouping variable's length equals the number of rows of x. -- Frank E

I have many functions for high-level plotting that early on in their code do something like strwidth('string', units='inches') before plotting. I do this before plot() to set the correct margins with par(mai=...), to leave room for wide text on the left or right margins. If the plotting device is not opened strwidth( ) causes an error that plot.new() needs to be called. I can

I am having good success in using pdf() to produce pdf graphics files for inclusion in documents processed by pdflatex [I'm using R 1.6.0 on Linux]. I am having one small problem consistently though, which I believe I also had with S-Plus's pdf.graph(): wasted space at the top of the graph which causes pdflatex to put the graph on a later page, when the current page has plenty of space.