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Hello: Can you tell me if there's a simple way to generate in R random vectors on the unit sphere in R^{n}? Additionally, are there references for this question? Thanks in advance. Tom -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read...

Hello: There is a function in the MASS library called mvrnorm(), and I wonder whether R has a corresponding function mvdnorm? I don't think it would be that tough to write, but has anyone done it yet? Thanks in...

Hello: I have been using sm.binomial() in the Bowman and Azzalini's sm package to smooth and plot estimated probabilities as a function of a covariate. I am concerned about my choice of bandwidth, and I was hoping there...

Hello: Assuming that I have used the coxph function to fit a Cox model with several covariates, is there a natural way to estimate a value of the survivorship function at, say, five years, S(5), along with a confidence...

Hello: I'm not sure what is going on in these two statements. the first seems to be right, but the second is a problem: > order(c(3,2,4,NA),na.last=TRUE) [1] 2 1 3 4 > order...

Hello: I have not compiled C code for R since around version 1.1.0, and i see that I am really missing something here. I am using widoes and mingw32 port of gcc. Now, as usual I have gone...

Hello: I have just used prompt() in R1.0.1, NT4.0, to make a file called myfun.Rd, in my %R_HOME%\bin subdirectory, then tried converting the .rd file to HTML using the Rdconv.bat, as follows: Rdconv...

Hello: Thus far I have only used R under NT 4.0, but recently at work we have acquired a new Solaris machine, on which R has just been installed. I was told a while ago by Professor Ripley on...

Hello: I am trying to get some text at an angle in the margins of a plot. I was accustomed under older versions of Splus to using srt in the mtext command, but that seems not to work under R...

Hello: I want to fit a model to count data where many counts are zero. I would like to posit that the baseline value of an immunologic marker impacts whether or not a patient experiences any events at all, and...

Hello, My specific system is > version _ platform i386-pc-mingw32 arch i386 os mingw32 system i386, mingw32 status major 1 minor 5.1 year 2002 month 06 day 17 language R Each of the hmisc and stepfun packages has a...

Hello: I'm trying to use Rcmd SHLIB to compile a single file, sann.c, to get sann.dll. I was able to get make libR.a to work, after going into MkRules and changing the line DLLTOOL=$(BINPREF)dlltool...

Hello: Using Redhat 7.3 and > version 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 am trying to install...

Hi: I remember a post several days ago by Jon Baron, concerning the behavior of sum() when one sets na.rm=TRUE: the result will be a zero sum for a vector of all NA's, as here, for the...

Hello: After using R, > version _ platform i386-pc-mingw32 arch x86 os Win32 system x86, Win32 status major 1 minor 3.1 year 2001 month 08 day 31 language R on NT 4.0 for some time, I have now...

Hello: This is a simple, I hope, question about the first example in section 3.6.4 of the manual, "Writing R extensions." I'm using R 1.1.0, and below I list some easy code that I got...

Dear R-help folks: Here is my platform: > version platform sparc-sun-solaris2.7 arch sparc os solaris2.7 system sparc, solaris2.7 status major 1 minor 5.0 year 2002 month 04 day 29 language R I have a...

Here is a related question on the same topic: I have recently installed R 1.5.1, with rpm, under Redhat 7.3. Things were going great, until I tried to install the package subselect, which said it needs BLAS...

You only need to get the blas and lapack rpm's and install them. Then all works perfectly well with installing subselect. > -----Original Message----- > From: Richards, Tom [mailto:richards at biounix3.upci.pitt.edu] > Sent: Tuesday, October 01, 2002 12...

Hello: I am having some difficulty with a DLL, using > version _ platform i386-pc-mingw32 arch x86 os Win32 system x86, Win32 status major 1 minor 2.1 year 2001 month 01 day 15 language R I have a library...