http://qs1969.pair.com?node_id=600600


in reply to Re^3: decomposing binary matrices
in thread decomposing binary matrices

Sorry, I transformed the data already, and included more than necessary. Try this instead (in which, again, {B, C, D} yield a separable submatrix):

my @grid = ( "ABCD1", "A0002", "0BCD3", "0BCD4");

Hugo