Using prepsubband for only a fraction of a dataset

[k-perez]

Hi Scott,

I have a long filterbank file, and am wondering what is the best way, if any, to analyze only a chunk of the data. While prepfold has the -start and -end options, prepdata and prepsubband are missing the -end option.

Thank-you

[scottransom]

You can get the same effect as -end by specifying -numout (and that is "more precise" since the resulting file size can be tuned to be good for FFTs, for example.

[k-perez]

Ah, I see. So -numout will specify the number of points after whichever -start point I use? Example: -start 0.25 -numout 4000 will take the 4000 points starting at the quarter point of the data?

[scottransom]

Exactly.