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Hello, I am basically familiar with R and am trying to import a module that someone else has written. I know that it must go into the R library but even after I place the file there R doesn't recognize it. The module is maanova, available from the Churchill lab group for analysis of microarray data, if anyone is familiar with it. Any ideas/help? Thanks, Heather --

Hi, If I have a vector: junk <- c(2,0,0,3,0) and want to access, say, all the elements that are greater than zero. I just do: junk[which(junk>0)] Now, If I have a list: jlist <- list(NULL,c(1,0),NULL,c(1,2,3), NULL) and want to access all the elements that have length greater than zero, I know how to find the elements with: which(sapply(jlist,length)>0) But how do I get a