matchms.filtering.metadata_processing.interpret_pepmass module

matchms.filtering.metadata_processing.interpret_pepmass.interpret_pepmass(spectrum_in, clone: bool | None = True) → Spectrum | None

Reads pepmass field, if present, and adds values to correct fields.

The field pepmass or PEPMASS is often used to describe the precursor ion. This function interprets the values as (mz, intensity, charge) and stores them in precursor_mz, precursor_intensity, and charge.

Parameters:

  • spectrum_in – Input spectrum.

  • clone – Optionally clone the Spectrum.

Returns:

Spectrum with interpreted pepmass metadata, or None if not present.

Return type:

Spectrum or None