PROcess (version 1.48.0)

renorm: Renormalize Spectra

Description

Renormalize spectra for m/z values greater than `cutoff'.

Usage

renorm(Ma, cutoff)

Arguments

Ma

a matrix, with rows the m/z values and the columns the samples.

cutoff

a real value, before which the portion of a spectrum will be ignored.

Value

A matrix, with rows the m/z values and the columns the samples. Only rows with m/z values greater than `cutoff' are kept.

Details

A sample of spectra will be normalized to have the same AUC, the median of the AUCs of spectra. Each AUC is calculated as the sum of the intensities whose m/z values are greater than `cutoff'.

Examples

example(rmBaseline)
rtM <- renorm(testM, cutoff=1500)