similar to: Export to File...

Hi, Somehow I forgot how to do this... Say I have a command that produced a 28 x 28 data matrix. How can I output the matrix into a txt file (rather than copy/paste the matrix)? Thanks... Kevin ------------------------------------------------- Ko-Kang Kevin Wang Statistical Analysis Division Leader Software Developers' Klub University of Auckland New Zealand

Hi, I input this command on a data matrix: > apply( traffic, 2, function(z){z-mean(z)}) and got the following error messages: Error in sum(..., na.rm = na.rm) : invalid "mode" of argument Can anyone tell me what is wrong here? Running R1.2.2 on Windows ME. Cheers, Kevin ------------------------------------------------- Ko-Kang Kevin Wang Statistical Analysis Division

Hi, Suppose I have a matrix with, say 12 columns. I would like to extract out column 2 ~ 8 and 11 ~ 12 then combine them together. I tried with success to extract out the columns by doing: foo <- test[,2:8] goo <- test[,11:12] However then I am having trouble combining foo and goo. Helps are appreciated! Cheers, Kevin ----------------------------------- Ko-Kang Kevin Wang

Hi, Suppose I have a dataset with 10 columns, let's call it "foo". Now if I want to extract out only column 2 ~ 8, then I know I can use either: foo[ ,2:8] or fooNew <- list( foo[ ,2:8] ) (Is there any other alternative, just out of curiosity?) But, if I only want, say, column 1, 4 and 7, I tried: fooNew <- list( x = foo[ ,1], y = foo[ ,4], z = foo[ , 7] )

Hi, Suppose I've got a data set that I found the eigenvalues and eigenvectors. Then I want to draw a screeplot for the eigenvalues. However it returns: Error in matrix(w.m, nc = NC) : negative extents to matrix Then I tried a plot() function on the eigenvalues of the data set, and I can successfully draw it! And the output looks like what the screeplot would show to me. Is there any

Hi, Suppose I want to test a set of random numbers (using the Binormal random number generator), input the following command to generate a set of random numbers: test <- rbinom( 10000000, 1, 0.5 ) How can I, after obtaining the result, export the vector "test" into an text file? Then, suppose I want to do something like: > x <- 1e10 > x [1] 1e+10

Hi, Can anyone tell me what might cause this error message? Error in .Fortran("swallocate", as.double(mtx), as.double(wt), as.integer(n), : C/Fortran function name not in load table This occurs when I copied the Splus stepwise() function into R. I can source into R fine, but when I need to call that function on some dataset, I got the above error message. Platform

Hi, I'm not sure if this can be done but.. I know that with ifelse() I can do something like: ifelse(x <= 3, 1, 2) to go through each element in my vector x, and if x_i <= 3 substitute the number with 1 else with 2. Essentially I'll get a vector with 2 levels. Can I tweak it so I can get 3-levels? For example: if(x <= 3) then 1 elseif(3 < x <= 4) then 2

Hi there, I know this question may sounds strange, but here it goes: Is it possible to delay the speed of a for loop? For example, if I have: for (i in 1:100) { blah blah blah } within the for loop I want to draw a series of plots, and combining the plots together I'll have an animation. Problem is the loop is too fast and I only see the end result (which is not surprising actually).

Hi there, I'm trying to get the manual for an R package (that I'm creating) to work... Firstly, I created the *.Rd files (by following the instructions in "Writing R Extensions" and using prompt() in R, then edit the *.Rd files. I then copy them into the "pkg/man" directory as suggested by the manual. However when I load the library (successfully) in R, I cannot

Hi, I was tutoring in the lab when a student asked me this question. Is it possible to save the work done in R, then source it back in AND display all the work within R later? I know that one can save the history (i.e. all the codes in a session) in *.R format, then source it back in at a later stage. However the historical codes will not be displayed within R, only the line source(...) is

Hi, Suppose I have a function: myfunc <- function(x, y) { ... } And within the function I want to print out the name of the x, y vectors. For example, if I do: > myfunc(foo, goo) [1] "foo" "goo" It shall return "foo", "goo" (with or without quotes is fine), where foo and goo are two vectors with numbers. I know this sounds strange, but I'd

Hi there, I'm trying to write an R library (for Windows version) when I encountered this problem. I put in a dataset called mussels into a sub-folder, data (I saw this is how it is done in other libraries). However when I load the library in R and typed: data(mussels) it complains it cannot find the data set in the library. Everything else works fine (so far), am I missing something

Hi, I'm having a mental block as to how I can automatically assign filenames to the output of the following code. I am wishing to create a separate .png file for every image created, each of them having a sequential filename ie "sourcefile_index.png" so that I can create a movie from them. Please could someone tell me where I am going wrong? the following code works fine and

Dear R users, I am using "subset" function to filter out specific conditions and would like to use the value of subsetted argument as a name of an object. Specifically, from the following statement: a <- subset(dat, dat$x == "A" & dat$xx == 1 & dat$xxx == "AB" & dat$y == "B" & dat$yy == 2) I would to assign the value of the 3rd

Hello all. I wish to read a large data set into R. My current issue is in getting the data so that R would be able to access it. Using read.table won't work since the data is over 1GB in size (and I am using windows XP), so my plan was to read the file chunk by chunk and each time move it into bigmemory (I'll play with that when the time will come, maybe ff is better ?!). I encountered

Hi there, Just out of curious, is there any difference between loess() and lowess() in R (and Splus in fact). Which one is more often used? Thanks, Ko-Kang Wang ------------------------------------------------------------------------------ Ko-Kang Kevin Wang Statistical Analysis Division Leader Software Developers' Klub (SDK) University of Auckland New Zealand

Hi, Can anyone tell me how I can compile R from source under Windows environemtn (I kind of know how to do it in a UNIX enviroment)? What I mean is, suppose I make some changes in the R base, or reorganising the libraries, and want to compile into a Setup.exe file (like the one located in CRAN), how should I do this? Many thanks in advance... Ko-Kang Wang

Hi, I am interested in seeing the LaTeX version of R manuals (such as An Introduction to R), and I found from CRAN that: "The texinfo sources of the latest version of these documents are contained in every R source distribution (in the subdirectory doc/manual of the extracted archive). " However when I went into that directory I only found the pdf and html version. Are there any

Dear List, Suppose I want to do a demonstration with R, which I will be showing a couple of different graphs (e.g. demo(graphics) ). However I want R to run through each graphics automatically. I can achieve this by changing the line in demo(graphics): opar <- par(ask = interactive() && (.Device %in% c("X11", "GTK", "windows",