nFeatures: How many features in a group?

In lgatto/MSnbase: Base Functions and Classes for Mass Spectrometry and Proteomics

How many features in a group?

Description

This function computes the number of features in the group defined by the feature variable fcol and appends this information in the feature data of object.

Usage

nFeatures(object, fcol)

Arguments

object	An instance of class MSnSet.
fcol	Feature variable defining the feature grouping structure.

Value

An updated MSnSet with a new feature variable fcol.nFeatures.

Author(s)

Laurent Gatto

Examples

library(pRolocdata)
data("hyperLOPIT2015ms3r1psm")
hyperLOPIT2015ms3r1psm <- nFeatures(hyperLOPIT2015ms3r1psm,
                                    "Protein.Group.Accessions")
i <- c("Protein.Group.Accessions", "Protein.Group.Accessions.nFeatures")
fData(hyperLOPIT2015ms3r1psm)[1:10, i]

lgatto/MSnbase documentation built on March 14, 2024, 7:06 a.m.