Hi
Suppose I have a matrix (cohort are rows and years are columns)
[2000] [2001] [2002] [2003]
[C1] 0.01 0.03 0.02 0.09
[C2] 0.06 0.05 0.07 0.11
[C3] 0.1 0.5 0.4 0.98
[C4] 0.7 0.6 0.2 0.77
I want to extracts the diagonals to get a matrix which looks like this (C1
becomes C2 in 2002, C2 becomes C3 in 2003 and so on)
[C1] [C2] [C3] [C4]
[2000] 0.01 0.06 0.1 0.7
[2001] 0.05 0.5 0.6 0
[2002] 0.4 0.2 0 0
[2003] 0.77 0 0 0
The matrix can be of any size (for simplicity I have created a 4*4). Is
there a function in R that does this? I know R has functions like R diag and
lower triangular but that doesnt help. Any tips will be appreciated.
Thanks!
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