improve filter to return a 'copy'

cheminfo / chromatography

Tools for storing, search and analyze GC/MS spectra

https://cheminfo.github.io/chromatography

MIT License

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Closed lpatiny closed 7 years ago

lpatiny commented 7 years ago

Currently the filter is an inplace modification.

Would be nice to also have as an option the possibility to get a copy of it.

maasencioh commented 7 years ago

@lpatiny the copy should be a copy of the full chromatogram right?