search for: surrouding

Displaying 1 result from an estimated 1 matches for "surrouding".

Did you mean: surrounding
2010 Dec 08
2
problem accessing complex list data frames
Hi all. I am currently attempting to build a list of sparse matrixes. That I have already achieved, by > vmat <- list() > for (i in 1:n) { > vmat <- c(vmat, sparseMatrix(i,j,x=data) > } How I am trying to select those elements from the list where the column e.g. 999 is not null. I can do this for one of the sparse matrices with > which(vmat[[1]][,999] != 0) which