Conditional Matrices
ifelse(mat1, mat2, NA) should do what you want. Patrick Burns patrick at burns-stat.com +44 (0)20 8525 0696 http://www.burns-stat.com (home of S Poetry and "A Guide for the Unwilling S User")
ISAIAH SHALWITZ wrote:
This seems like a simple problem but I can't figure it out: I have two identical DIMENSION matrices. Both contain only binary values NOT identical between matrices. What I want to do: If in cell (1,1) the value in the first matrix (x) equals 1, then I keep the value in cell (1,1) in the second matrix (y). If in cell (1,1) the value in the first matrix (x) equals 0, then I change the value in cell (1,1) in the second matrix (y)to missing (NA). Repeat for every pair of cells (coordinates of the paired cells always match). Please help. I
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