How about you take one of the plethora of solutions you have been provided that solve the problem for "I'd like to keep only the largest magnitude within each second.". Alter it to solve your actual problem, then show us the output you get and the output you want if you can't make it work?

For future reference, providing a little sample data, your best attempt at coding the solution, your attempts' output, and the output you desire in your initial node actually saves everyone (especially you) a lot of time. An indication of why you want to perform a particular trick often helps us provide a better answer too.

Perl's payment curve coincides with its learning curve.

In reply to Re^3: Compare fields in a file by GrandFather
in thread Compare fields in a file by honyok

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