Displaying 1 result from an estimated 1 matches for "tp4647048p4647065".
2012 Oct 22
4
Help with applying a function to all possible 2x2 submatrices
Hi all,
I'm working with a large data set (on the order of 300X300) and trying to
apply a function which compares the elements of all possible 2x2
submatrices. There are rc(r-1)(c-1) such submatrices, so obviously the naive
method of looping through the rows and columns is computationally unfeasible
for my data set:
for(i in 1:(nrow(data)-1)) {
for(j in (i+1):nrow(data)) {
for (m