How to define a number of matrices through loops
Hi Ajss,
You instantiated mt as a vector, not a list. Try:
row <- c(3,4,6,4,5)
mt <- vector("list", length(row)) # list with length of "row" elements
for (i in 1:5){
mt[[i]] <- matrix(nrow=row[i], ncol=4)
}
mt
Or in one line:
mt <- lapply(1:5, function(x) matrix(nrow = x, ncol = 4))
mt
Hope this helps,
Josh
On Fri, Apr 8, 2011 at 8:22 PM, Amarjit Singh Sethi <set_alt at yahoo.co.in> wrote:
Hi all
I need to deal with a number (say, 5) of diferent ordered matrices
simultaneously?in my computational work. I tried to define these matrices
through looping, but got an error message:
row <- c(3,4,6,4,5)
mt <- c()
for (i in 1:5){
mt[i] <- matrix(nrow=row[i],ncol=4)
}
mt
Kindly help
Yours
ajss
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/