similar to: read.pnm question in R-beta

Dear R People: I am trying to replicate a cool example that I saw on the R-bloggers some time ago by kafka399. Here are the lines tI think may be causing the trouble: gray_file <- read.pnm(path) pos[i,] <- c(gray_file@grey) The warning error that I get is "In rep(cellres, length=2): x is NULL so the result will be NULL Any suggestions would be much appreciated. Thanks,

Hello! Over the weekend, I updated my RcmdrPlugin.qual package. It works fine on a 64 bit Windows machine but not a 32 bit. This is very strange. The new menu with all of the Quality Control stuff does not appear. Have any of you run into this sort of thing before, please? Thanks, Sincerely, Erin Erin M. Hodgess, Ph.D. Associate Professor Department of Computer and Mathematical Sciences

Hi, I ran into the following peculiarity involving S4 method dispatch and namespaces. I develop a package which have a namespace and which depends on 'pixmap' package, which itself does not have a namespace. Now, in my package I have a class which has a slot for objects from class "pixmap" and I want to have a "plot" method for this new class. Not to clutter the

Dear R People: I have a question about a "sorting" problem, please. I have a vector xx: > xx [1] -2.0 1.4 -1.2 -2.2 0.4 1.5 -2.2 0.2 -0.4 -0.9 and a vector of breaks: > xx.y [1] -2.2000000 -0.9666667 0.2666667 1.5000000 I want to produce another vector z which contains the number of the class that each data point is in. for instance, xx[1] is between xx.y[1] and

Dear Debian People: Is there a way to run a little script (on Ubuntu Manic Meerkat) every hour, please? I know that this is more of a LINUX/UNIX question rather than an R question. Sorry. Thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgesse@uhd.edu [[alternative HTML version deleted]]

Hi, I am trying to use "read.pnm" from the package "pixmap" to read more than 10 thousand image files in "mydir". > file.list <- dir( "mydir", full=T) > for( i in 1:length(file.list) ) { print(i) x <- read.pnm(file.list[i]) } In the beginning it was fine. But after reading 1020 images or so, the read.pnm function seems to crash on

Dear R Developers: Is there a way to look at the underlying code from such items as R_setup_starma, please? Thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgesse@uhd.edu [[alternative HTML version deleted]]

Dear R Debian People: I have put this on regular R help as well, but thought that I'd try here too. I updated to R-2.10.0 on Ubuntu Karmic Koala via apt-get update, apt-get install. Then I had a problem that said that I need MASS <= R-2.9.2. Fair enough. Uwe Ligges was kind enough to point out that I needed to use > update.packges(checkBuilt=TRUE) So I did. Now the menu on Rcmdr

Hi again. On Windows, when I try to use the "install packages" from the menu, there is no Rcmdr and no RcmdrPlugins to be seen. thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgesse@uhd.edu [[alternative HTML version deleted]]

Dear R Developers: Why is it that the singular value decomposition is used when running regression with arima, please? I've been looking for a reference for that but have come up empty so far. Thank you for any help. Sincerely, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgesse@uhd.edu

Dear R Development People: I was trying to build R-2.12.2 from source on a Windows XP machine. Doing the make all recommended works fine, but building the bitmap dll is a problem. It seems to be in the libpng directory. I got libpng-1.5.1, and untarred it. However, there is no makefile.mingw file in the scripts directory. I then obtained a version of libpng-1.4.5, and the file is there.

Dear R Development People: I have written a couple of plugins for Rcmdr and they do not seem to work with R-2.11.0. Here is the output: > library(RcmdrPlugin.epack) Loading required package: Rcmdr Loading required package: tcltk Loading Tcl/Tk interface ... done Loading required package: car --- Please select a CRAN mirror for use in this session --- Rcmdr Version 1.5-4 Attaching package:

Dear R Debian People: I have a desktop which has both Windows and Debian operating systems. If I am on the Debian side, is there a way to access file from the Windows side, please? Thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgesse@uhd.edu [[alternative HTML version deleted]]

Hi, my name is Ellen. I want to ask you about R Code. I got a code for extracting a pixel value, but I can't compile it..  It is said "Error in is.data.frame(x) : object 'lena' not found" Here is the original full code: library(pixmap) lena <- read.pnm("oldlennablur.pgm") write.table(lena@grey,"mylenna", quote=FALSE, row.names = FALSE, col.names=

Hi Ryszard! There is a dist function in R. It's in the mva package. You can set the kind of distance that you want. Thanks, Erin mailto:hodgess at gator.uhd.edu

Dear R People: I have a data frame with the following column names: > names(funky) [1] "UHD.1" "UHD.2" "UHD.3" "UHD.4" "L..W..1" "L..W..2" "L..W..3" [8] "L..W..4" "B..W..1" "B..W..2" "B..W..3" "B..W..4" "W..B..1" "W..B..2" [15]

Dear R People: When the D function is used for a symbolic derivative, an expression is returned, which is fine. How do you change that expression to a function, please? I've been experimenting with substitute and deparse, but no success yet. This is R 1.8.0 for Windows. thanks in advance for the help! Sincerely, Erin Hodgess mailto: hodgess at gator.uhd.edu

Hi! After unziping the CRAN file e1071.zip on my Win95 library directory, I start R and type >library(e1071) After that, help commands of the e1071 functions work (i.e., help(read.pnm), BUT some functions themselves are not available: > read.pnm Error: Object "read.pnm" not found I've looked at the file library/R/e1071 with an ascii editor and it seems like the functions

Dear R People: In the function "decompose", the object has the class of "decomposed.ts". (from package stats) I would like to see the class definition and the method for the plotting. However, when I use isClass("decomposed.ts") I get "FALSE". When I check getMethods("plot") there is no method for plot on decomposed.ts Any suggestions,

Hello! I'm trying to install R-patched from source on a Windows 64 bit laptop. I have installed R-tools 2.16 and set up the jpeg, tiff, and libpng files Here is the output: c:\R64\R-patched\src\gnuwin32>make all recommended make all recommended make[1]: `MkRules' is up to date. make[4]: Nothing to be done for `svnonly'. installing C headers make[2]: Nothing to be done for