search for: ypeng

...allowed to have zero values. Does anybody encounter similar problem? Paul. -- What one believes to be true either is true or becomes true. -- John Lilly o-----------------------------------------------------------------o Paul Y. Peng, PhD Web: www.math.mun.ca/~ypeng Department of Mathematics and Statistics Fax: (709) 737 3010 Memorial University of Newfoundland Phone: (709) 737 8080 St. John's, NL A1C 5S7, Canada E-mail: ypeng at math.mun.ca o-----------------------------------------------------------------o -.-.-.-.-.-.-.-.-.-.-.-.-....

Dear List, Does anyone know when will be available Peter Dalgaard's book: "Introductory Statistics with R" ?. According to Amazon: "This item will be published on August 15, 2002", but it continues unpublised. Thanks, Carlos Ortega. _______________________________________________________________ Yahoo! Messenger Nueva versi?n: Webcam, voz, y mucho m?s ?Gratis!

...ly(c(a=1,b=2), names) Problem: R ("all" versions) behaves the same as S+5.1, which is wrong IMO. {since some might disagree, I didn't yet post to R-bugs ..} ------- Start of forwarded message ------- Date: Thu, 22 Jul 1999 23:14:57 -0230 From: "Paul Y. Peng" <ypeng@math.mun.ca> To: s-news <s-news@wubios.wustl.edu> Subject: [S] Feature or bug? In S-PLUS 3.3 (DEC Alpha) and S-PLUS 2000, > z <- c("a"=1, "b"=2) > lapply(z, function(x)names(x)) $a: [1] "a" $b: [1] "b" But in S-PLUS 5.1 (Linux), > z...

Hi, Suppose that I have a list where each component is a list of two matrices. I also have a vector of weights. How can I collapse my list of lists into a single list of two matrices where each matrix in the result is the weighted sum of the corresponding matrices. I could use a loop but this is a nested calculation so I was hoping there is a more efficient way to do this. To help clarify,

Hi R users, I am still a relatively new R user migrated from S+. I wonder in R how do you handle one difference between R and S+. S+ saves objects as different files in .Data directory while R saves all objects in a big file .RData. In S+, I can start two S+ sessions from the same directory and work simultaneously as long as new objects in the two sessions are not in the same names. This is

Dear All, I am desperately trying to find any R package that fits a mixture survival models also know as a cure models. This are survival model where the survival function is improper which also means that a fraction of subjects are expected not to expreience the event. A Huge literature has been developed for thes type of models but I couldn't find any R package that fits this type of

...Not sure whether it will work in S-PLUS or not. But I will give it a try. Thank you. Paul. > > Have you checked CRAN? There's an "ellipse" package on CRAN for quite a > while. > > Andy > > > -----Original Message----- > > From: Paul Y. Peng [mailto:ypeng at math.mun.ca] > > Sent: Tuesday, October 22, 2002 3:30 PM > > To: s-news; r-help at stat.math.ethz.ch > > Subject: [S] Draw ellipses in S-PLUS or R? > > > > > > Dear S-PLUS/R users: > > > > Do you know any default function or a user contributed func...

Dear S-PLUS/R users: Do you know any default function or a user contributed function that can draw an ellipse with given axes and origin? Thanks for any help. Paul. -- Romance, like alcohol, should be enjoyed, but should not be allowed to become necessary. -- Edgar Friedenberg -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list --

Dear R users: I wonder anyone is aware of such a thing from lgamma() > lgamma(-0.8) [1] 1.747207 I thought it should be NA as in S-PLUS. Both R-1.3.1 and R-1.5.1 report this result. I don't have the latest R-1.6.1 so I don't know whether this is corrected or not. Happy holidays, Paul.

Dear R users, Does anyone notice that Rterm.exe does not work well with rxvt.exe, an xterm emulator for Cygwin? It produces an error message window with the following message: This program has performed an illegal operation and will be shut down. If the problem persists, contact the program vendor It also prints "Signal 127" in rxvt window. Rterm --ess, however, works.

Hi, does anybody know how to use the dual processors in the machines of a cluster? I am using R with rpvm and snow packages. I usually start pvm daemon and add host machines first, and then run R to start my computing work. But I find that only one processor in each machine is used in this way and the other one always stays idle. Is there any simple way to tell pvm to use the two processors at

Dear R users, Have you experienced any difficulty in calling R's ISNAN() from a C code? I have C codes including ISNAN() calls and they worked well until I upgraded my R from 1.7 to later versions. When I tried to compile the codes in the version 1.8 and 1.9, I got error messages like this: test.obj : error LNK2001: unresolved external symbol _isnan .\testR.dll : fatal error LNK1120: 1

This email is forwarded on behalf of Dr. Herbert Gaskill. Please do not reply to me but direct enquiries to Ms Wanda Heath <wanda at math.mun.ca> or Dr. Herbert Gaskill <head at math.mun.ca>. Apologies for cross-posting. MEMORIAL UNIVERSITY OF NEWFOUNDLAND St. John's, Newfoundland, Canada A1C 5S7 www.math.mun.ca DEPARTMENT OF MATHEMATICS AND STATISTICS The Department of

Dear R users, I have a .RData which contains .Last object as follows: .Last <- function () { savehistory(file = ".Rhistory") } In this directory, if I issue the following command Rterm --save < mycmds.q to execute commands in mycmds.q and to save results in .RData, I got the following error message towards the end of the execution: Error in savehistory(file) :

I have used S-PLUS for years. Now I am learning to use R in Windows'98. I downloaded the latest version and installed it as instructed. However, I cannot find answers from online help to the following questions I encountered. If any of you has quick answers to these questions, please drop me a couple of lines. Thanks. 1. Why does R change my working directory during a session? I often used