I revised the code some more according to what makes sense. And I get errors regarding uninitialized values @values and @elements in hash element at each line of the file, list.txt. 

     use strict; 
     use warnings;

     open(IN, "list.txt") or die;
     chomp($line = <IN>);
     ($element, @abc) = split /\s+/, $line;
     while (chomp($line = <IN>)) {
     ($values, @xyz) = split /\s+/, $line;
     for ($i=0; $i<@xyz; $i++) {
     $s {$elements}{$values[$i]} = $xyz[$i];
        }
    }
    close(IN);

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In reply to Re^4: matrices and non-numerical values by thschhk
in thread matrices and non-numerical values by thschhk

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