$ratio1 = ( $$arr_ref2[$index1] / $$arr_ref1[$index1],
+ "\t" );
                $variable1 .= $ratio1;    #join column by column

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Have you tried to see inside $variable1 and $ratio1?

In reply to Re: Filter rows according to certain criteria based on CV by Anonymous Monk
in thread Filter rows according to certain criteria based on CV by hellohello1

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