The question is, do you know how to print the matrix at all? I'm going to assume you can, and if so instead of: 
    # pseudocode
    for row (0..rows) {
        for col (0..cols) {
              print array[row][col]
        }
    }

[download]
You substitute a list for the colums and rows you want to iterate over: 
    # pseudocode
    for row (@goodrows) {
        for col (@goodcols) {
              print array[row][col]
        }
    }

[download]


As an aside, this is interesting... 
@gm=map { [ @$_[@goodcols] ] } @matrix[@goodrows];

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Giving a matrix with only the good columns and rows in it. Hmm. Although I'd have preferred some kind of @matrix[@goodrows]->[@goodcols] syntax, but I'll have to wait for Perl 6 for that.

In reply to Re: How can I print out part of the matrix by clintp
in thread How can I print out part of the matrix by Anonymous Monk

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