George, Charles R wrote:
Hello R users
I would like to ask if anyone knows a computationally fast solution to this problem:
I have an original matrix and an index matrix. The original matrix is ca 4000x4000 cells, and the index matrix has 261 unique values. From these, I want to produce a new
On 4 Aug 2003 at 10:10, Uwe Ligges wrote:
George, Charles R wrote:
snip
replace(originalMat, indexMat[,1], indexMat[,2])
Shouldnt that be
originalmat - replace(originalMat, indexMat[,1], indexMat[,2])
?
Kjetil Halvorsen
Uwe Ligges
the output would look like this:
Hello R users
I would like to ask if anyone knows a computationally fast solution to this problem:
I have an original matrix and an index matrix. The original matrix is ca 4000x4000
cells, and the index matrix has 261 unique values. From these, I want to produce a new
matrix.
Consider the
