Source code for matchms.filtering.normalize_intensities

import logging
import numpy
from matchms.typing import SpectrumType
from ..Fragments import Fragments

logger = logging.getLogger("matchms")

[docs]def normalize_intensities(spectrum_in: SpectrumType) -> SpectrumType: """Normalize intensities of peaks (and losses) to unit height.""" if spectrum_in is None: return None spectrum = spectrum_in.clone() if len(spectrum.peaks) == 0: return spectrum max_intensity = numpy.max(spectrum.peaks.intensities) if max_intensity <= 0: logger.warning("Spectrum with all peak intensities <= 0 was set to None.") return None # Normalize peak intensities mz, intensities =, spectrum.peaks.intensities normalized_intensities = intensities / max_intensity spectrum.peaks = Fragments(mz=mz, intensities=normalized_intensities) # Normalize loss intensities if spectrum.losses is not None and len(spectrum.losses) > 0: mz, intensities =, spectrum.losses.intensities normalized_intensities = intensities / max_intensity spectrum.losses = Fragments(mz=mz, intensities=normalized_intensities) return spectrum