Since there's already been fish thrown . . . FORE! 

perl -lane '/^N2O-(\d+)/;$t{$1}+=$F[-1];$c{$1}++;END{for(sort{$a<=>$b}
+keys%t){printf"N2O-$_ %0.3f\n",$t{$_}/$c{$_}}}'

[download]

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re: HOW to calculate the column data by Fletch
in thread HOW to calculate the column data by xbmy

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