search for: thematrix

...poly(x, 2) : missing values are not allowed in 'poly' The following function seems to be an okay workaround. Poly<- function(x, degree = 1, coefs = NULL, raw = FALSE, ...) { notNA<-!is.na(x) answer<-poly(x[notNA], degree=degree, coefs=coefs, raw=raw, ...) THEMATRIX<-matrix(NA, nrow=length(x), ncol=degree) THEMATRIX[notNA,]<-answer attributes(THEMATRIX)[c('degree', 'coefs', 'class')]<- attributes(answer)[c('degree', 'coefs', 'class')] THEMATRIX } > lm( y ~ Poly(x,2) ) Call:...

...hen I want to compute the eigenvalues & eigenvectors of a specific matrix, R crashes (i.e. it stops responding to any input). I've tried it with different versions of R (2.1.1, 2.2.0, 2.2.1) - all with crashing as result. What I did before the crash was: M <- as.matrix(read.table("thematrix",header=T)) eigen(M) If, instead of eigen(M), I use eigen(M, EISPACK=T), R doesn't crash. So, I know a workaround my problem, but still don't understand why R crashes. Could anyone explain this? In case someone wants to download my matrix to see where it goes wrong, it can be download...

Can anyone tell me how to delete a row in a matrix? I have searched around and couldn't find a straightforward way to do this. Thanks, any help will be greatly appreciated. Jennifer [[alternative HTML version deleted]]

I've written a program that involves a loop that creates a matrix. I'd like to be able to manipulate that matrix on my R desktop, but after I run the function, that matrix does not appear when I type ls(). How can I make that matrix become an object that I can manipulate? Thanks!

Sometimes when I save a file to a samba-shared drive the application is unable to save there and asks if the file is write protected or if the disk is full. If I then save it to a local drive and copy it there using Windows Explorer, it can overwrite the file fine. Do I need to make that myriad of changes to my XP Pro registry? Most of the time it works fine, just from time to time it will give