sparseIntensityMatrix: sparseIntensityMatrix Class Constructor

In CeMOS-Mannheim/moleculaR: Spatial Probabilistic Mapping of Metabolite Ensembles in Mass Spectrometry Imaging

sparseIntensityMatrix Class Constructor

Description

An S3 class to hold mass spectrometry imaging (MSI) intensity data in a sparse representation ('Matrix::dgCMatrix' class) with few additional slots. It is used to speed-up computation. This constructor is for internal use and normally should not be called by the user.

Usage

sparseIntensityMatrix(spmat, mzAxis, coordinates)

Arguments

spmat	A sparse matrix of type 'Matrix::dgCMatrix' holding MSI intensity data.
mzAxis	A numeric, the overall m/z axis for the experiment.
coordinates	A two-column data.frame, the coordinates of the spectra which are stored in rows of 'spmat'.

Value

An S3 object 'sparseIntensityMatrix' with the following entries

• spmat: A sparse matrix of type 'Matrix::dgCMatrix' holding MSI intensity data.

• mzAxis: A numeric, the overall m/z axis for the experiment.

• coordinates: A two-column data.frame, the coordinates of the spectra which are stored in rows of 'spmat'.

CeMOS-Mannheim/moleculaR documentation built on April 14, 2025, 8:27 a.m.