MSnbase: nFeatures – R documentation

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nFeatures

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]

MSnbase

Base Functions and Classes for Mass Spectrometry and Proteomics

v2.16.1

Artistic-2.0

Authors

Laurent Gatto, Johannes Rainer and Sebastian Gibb with contributions from Guangchuang Yu, Samuel Wieczorek, Vasile-Cosmin Lazar, Vladislav Petyuk, Thomas Naake, Richie Cotton, Arne Smits, Martina Fisher, Ludger Goeminne, Adriaan Sticker and Lieven Clement.

Initial release