On Dec 21, 2007 3:58 PM, Jonas Malmros <[EMAIL PROTECTED]> wrote:
> I wonder if there is a function in R with which I can create a square
> matrix with elements off main diagonal (for example one diagonal below
> the main diagonal).
Try this and adjust the formula for other patterns:
> mm <- matrix(nr = 5, nc = 5)
> (row(mm) == col(mm) + 1) + 0
[,1] [,2] [,3] [,4] [,5]
[1,] 0 0 0 0 0
[2,] 1 0 0 0 0
[3,] 0 1 0 0 0
[4,] 0 0 1 0 0
[5,] 0 0 0 1 0
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