Search Archives

Hi, I would like to extract the last row of each group in a data frame. The data frame is as follows Name Value A 1 A 2 A 3 B 4 B 8 C 2 D 3 I would...

Hi, I wonder how to have R automatically print stack trace produced by traceback upon errors during interactive uses. I tried the suggestions on http://old.nabble.com/Automatically-execute-traceback-when-execution-of-script-causes-error--td22368483.html#a22368775...

Hi, I want to plot a polynomial in the form like ax^2 + bxy + cy^2 + dx + ey + f =0 without solving it(since I may have 3 or 4 dimensional polynomial and it's really hard to solve). Is...

Hi, I need to use pf() from Rcpp but I couldn't seem to find out how. For example, the code looks like this: #include <Rcpp.h> ... Rcpp::pf(1.2, 5, 2); ... The compiler couldn't find pf(). I...

Hi, How can I find the index of the next largest element in a sorted vector if an element is not found. for example, searching 2 in c(0,3,4) would return 1 since 2 is not in the...

Hi. I finally made Rmpi run under Windows 64bit and simplified how to load Rmpi under both 32bit and 64bit windows. See the instructions at http://www.stats.uwo.ca/faculty/yu/Rmpi/windows.htm I haven't test this...

Thanks... I finally used BrowseURL(), which is how Rcmdr does this... it starts firefox and things are ok... Thanks Hao Peter Dalgaard wrote: > Hao Liu wrote: > >> Dear All: >> >> I currently have a TK window start a acroread window: However, when...

Hi, I am using barplot and would like to know if it is possible to have bars filled with one color while use a different color for the shading lines. The following code colors the shading lines, leaving the bars...

Dear R-help, Is it possible to use win.metafile() on *nix versions of R? I tried R 2.1.1 on FreeBSD and R 1.9.0 on redhat with no success. I need to give some graphs generated...

?remove.packages Guo-Hao Huang -------------------------------------------------- From: "wenjun zheng" <wjzheng09 at gmail.com> Sent: Monday, January 04, 2010 11:20 PM To: <R-help at r-project.org> Subject: [R] How to uninstall R packages > Dear all, > > I am puzzled that...

Hello, Recently I noticed that there were some packages coming out for visualizing microarray data in some pathway background (e.g. KEGG). I am thinking if it is possible to also include the quantitative information of metabolites in the colored...

Dear gurus: I have a question on how to configure the margin layout on tcl/tk GUI objects like tkcanvas, tkframe or tktoplevel. For example, if I want to leave a larger margin on the left side of the GUI...

Hi All, I did a google search and could not find the answer. Thus I post this message. I found runmax only work for positive numbers. x = rep(-1,10) runmax(x,3) x = rep(0, 10) runmax(x,3...

Hi, I currently combine multiple processed data (data frame) into a list and save the list as ".rda" using the save command. When new data come, I load the rda file, process the new data into a data frame, append...

Hello, I have a vector (v) with 6 columns and 2000 rows. I am trying to do one sample t.test for each row (I know this sounds crazy) and put the p.values into the 7th column. I know...

Hi. Just let you know that 32 and 64bit binary Rmpi for windows is available for download. You need the latest 64bit MPICH2 1.3.2p1 to work on 64bit R 2.12.2. Be aware that I compiled 32bit...

You can try rgl package. It utilizes OpenGL library. Or, check the CRAN to find other gtk based package ----- Original Message ----- From: "kapo coulibaly" <kmcoulib at gmail.com> To: <r-help at r-project.org> Sent: Friday, February 20, 2009...

Hi Everyone, Some R function will make R copy the object AFTER the function call, like nrow, while some others don't, like sum. For example the following code: x = as.double(1:1e8) system.time(x[1] <- 100) y...

Hi, I would like to get the actual object name passed as a parameter of a function and am using deparse(substitute(x)) to do that. It doesn't work when it is used along with the foreach package. Appreciate...

Hi, I have an error happened when I use exp() in my Fortran code. My Fortran code is SUBROUTINE f(n,c) REAL, INTENT(IN) :: n(10) REAL, INTENT(OUT) :: c(10) INTEGER :: k DO k=1, 10 c(k...