MALDIquant (version 1.3)

trim-methods: Trim an AbstractMassObject object.

Description

These methods trim an AbstractMassObject object on left side (ltrim), right side (rtrim), or both sides (trim). This is useful if some mass ranges should be excluded from further analysis.

Usage

## S3 method for class 'AbstractMassObject,numeric':
ltrim(object, minMass) 
## S3 method for class 'list,numeric':
ltrim(object, minMass) 
## S3 method for class 'AbstractMassObject,numeric':
rtrim(object, maxMass) 
## S3 method for class 'list,numeric':
rtrim(object, maxMass) 
## S3 method for class 'AbstractMassObject,numeric,numeric':
trim(object, minMass, maxMass) 
## S3 method for class 'list,numeric,numeric':
trim(object, minMass, maxMass)

Arguments

object

AbstractMassObject object or a list of AbstractMassObject objects.

minMass

numeric, minimal mass which should included.

maxMass

numeric, maximal mass which should included.

References

See website: http://strimmerlab.org/software/maldiquant/

See Also

AbstractMassObject, MassPeaks, MassSpectrum

Examples

## load library
library("MALDIquant");

## load example data
data("fiedler2009subset", package="MALDIquant");

## select only one spectrum
s <- fiedler2009subset[[1]]

## remove all mass lower 3000
ltrim(s, 3000)

## remove all mass higher 8000
rtrim(s, 8000)

## remove all mass lower 3000 and higher 8000
trim(s, 3000, 8000)