May I ask, how do the numbers go from one of your chains into the CSV data table that you are using? I ask because it appears you might be able to combine the chain-to-data process with the data manipulation process you show here, and realize a considerable savings over working with the data twice. The only way I can imagine this not being true is if you never see the original chains, only the resulting CSV data.

Also, are earlier chain numbers always lesser than later numbers, as they are in the sample chains you provided? This isn't a deal breaker, but it provides some interesting possibilities.

In reply to Re: Looking for the first item in the chain by oakb
in thread Looking for the first item in the chain by vagabonding electron

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