Hi,
how can I order the rows and columns of a matrix A to generate B, in order
to minimize the length(rle(B)$lengths) for all the rows and columns ?
> set.seed(5)
> a <- matrix(rnorm(200), nrow=20)
> a[a<=0] <- 0
> a[a>0] <- 1
> a
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,] 0 1 1 0 1 0 1 0 0 1
[2,] 1 1 0 1 0 1 1 0 1 0
[3,] 0 1 0 0 1 1 0 1 1 1
[4,] 1 1 1 1 0 1 0 1 1 1
[5,] 1 1 0 0 1 0 1 0 0 0
[6,] 0 0 1 0 0 1 1 0 0 0
[7,] 0 1 0 0 1 0 0 1 0 0
[8,] 0 1 0 0 0 0 1 0 0 0
[9,] 0 0 0 0 0 0 0 0 0 1
[10,] 1 0 0 0 0 1 0 0 0 0
[11,] 1 1 1 0 1 0 1 1 0 1
[12,] 0 1 1 0 0 1 0 1 1 1
[13,] 0 1 1 1 1 1 0 0 0 0
[14,] 0 1 0 1 1 1 0 1 0 1
[15,] 0 1 0 1 1 0 1 0 0 0
[16,] 0 1 0 0 1 1 1 1 1 1
[17,] 0 0 1 1 0 0 1 0 1 1
[18,] 0 0 0 1 0 1 0 1 0 1
[19,] 1 0 0 1 0 1 1 0 1 0
[20,] 0 0 1 0 0 0 1 1 0 1
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