BrowserUk, I wish I could buy you a beer or something, this has all come out perfectly! I put your subroutines into the bigger script and we had all the 400k by 400k comparisons in less than a day. Now to analyzing and plotting it... Thanks again.

In reply to Re^4: Huge data file and looping best practices by carillonator
in thread Huge data file and looping best practices by carillonator

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