matchms.filtering.peak_processing.select_by_mz module

matchms.filtering.peak_processing.select_by_mz.select_by_mz(spectrum_in: Spectrum, mz_from: float = 0.0, mz_to: float = 1000.0, clone: bool | None = True) → Spectrum | None[source]

Keep only peaks between mz_from and mz_to (keep if mz_from >= m/z >= mz_to).

Parameters:

  • spectrum_in – Input spectrum.

  • mz_from – Set lower threshold for m/z peak positions. Default is 0.0.

  • mz_to – Set upper threshold for m/z peak positions. Default is 1000.0.

  • clone – Optionally clone the Spectrum.

Returns:

Spectrum with peaks within the specified mz range, or None if not present.

Return type:

Spectrum or None