deletePeaks: Delete peaks from a 'MassPeaks' objects

In MALDIrppa: MALDI Mass Spectrometry Data Robust Pre-Processing and Analysis

Delete peaks from a MassPeaks objects

Description

This function deletes peaks of height (intensity) below a given value in MassPeaks objects.

Usage

deletePeaks(x, min = NULL)

Arguments

x	A list of MassPeaks objects.
min	Lower threshold used to discard a peak.

Details

This functions takes a list of MassPeaks objects and filters out peaks of height (intensity) falling below the given minimum value.

Value

A filtered list of MassPeaks objects.

Examples

# Load example data

data(spectra) # list of MassSpectra class objects

# Some pre-processing

spectra <- screenSpectra(spectra)$fspectra
spectra <- transformIntensity(spectra, method = "sqrt")
spectra <- wavSmoothing(spectra)
spectra <- removeBaseline(spectra)
peaks <- detectPeaks(spectra)

# Delete peaks of intensity < 30

peaks <- deletePeaks(peaks, min = 30)

MALDIrppa documentation built on March 29, 2022, 1:05 a.m.