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in reply to Re^4: combining two csv files by using math operations
in thread combining two csv files by using math operations

And instead you got ... ?

Still seems to work as expected with a one-line SSCCE.

$ perl -Mstrict -wE 'my $avg = (1.0 + 3.0) / 2.; say sprintf("%E", $av +g)' 2.000000E+00
Try taking the file ops out of the equation, and add some debugging during the flow to see that your variables contain what you think they do.

Hope this helps!


The way forward always starts with a minimal test.