while(<>){
($coords,$entry)=split;
($coord1,$coord2)=split 'v',$coords;
$M{$coord1}{$coord2}=$entry;
}
print $M{AA}{CH},"\n"; #just to test

[download]
chas
(I'm not sure what you meant about "multiple results" or what you wanted to do in that case, so I didn't consider that.)
(Update: My apologies - I started thinking about the question and forgot to make make the matrix "symmetric" as you asked; however, I'm a bit confused about exactly how you want this handled because the matrix doesn't seem necessarily square (or am I misunderstanding?) You could certainly make a new matrix in a similar way, replacing various xy entries by (xy entry + yx entry)/2 if both entries exist. But what if they don't both exist?)

In reply to Re: constructing a matrix with perl by chas
in thread constructing a matrix with perl by Anonymous Monk

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