search for: chequerboard

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2002 May 18
3
checkerboard plot?
Hi, I've been doing a lot of CA modeling lately and am now wanting to make some checkerboard plots in R. Let's say I have a matrix: > is.matrix(junk) [1] TRUE > junk [,1] [,2] [,3] [,4] [,5] [1,] 0 0 1 0 0 [2,] 0 1 1 1 0 [3,] 0 1 0 0 1 [4,] 0 1 1 1 1 [5,] 0 1 0 0 0 > and I want to make a