Your samples appear to be sorted. If this is true of your actual data you wouldn't need to keep much state and could just use a merging algorithm, comparing only the first line of each file.

Comment: This looks like you might be collating statistical responses (column 5 is average, column 6 is response count?). If so, would you want the weighted average rather than just regular average? (e.g., column 5 from first lines would be (6 * 0.25 + 0.30 * 8) / (6 + 8) = 0.27857). Of course, I have no idea what you are actually trying to do so feel free to ignore this if I'm mis-interpreting.

Good Day,
    Dean

In reply to Re: Merging partially duplicate lines by duelafn
in thread Merging partially duplicate lines by K_Edw

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