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MALDIquant (version 1.18)

findEmptyMassObjects: Finds or removes empty AbstractMassObject objects in a list.

Description

These functions looks for empty '>AbstractMassObject objects in a list.

Usage

findEmptyMassObjects(l)

removeEmptyMassObjects(l)

Arguments

l

list, list of '>AbstractMassObject where empty objects should be found or removed.

Value

findEmptyMassObjects: Returns a vector of indices referring to empty '>AbstractMassObject objects.

removeEmptyMassObjects: Returns a list of '>AbstractMassObject objects but without empty ones.

See Also

isEmpty,AbstractMassObject-method, '>AbstractMassObject

Website: http://strimmerlab.org/software/maldiquant/

Examples

Run this code
# NOT RUN {
## load package
library("MALDIquant")

## create list
peakList <- list()

## create two MassPeaks objects and add them to the list
peakList[[1]] <- createMassPeaks(mass=1:100, intensity=1:100,
                                 metaData=list(name="example 1"))
peakList[[2]] <- createMassPeaks(mass=1:100, intensity=1:100,
                                 metaData=list(name="example 2"))

## find empty objects (there should not be any one)
findEmptyMassObjects(peakList)

## add an empty MassPeaks object to the list
peakList[[3]] <- createMassPeaks(mass=double(), intensity=double(),
                                 metaData=list(name="empty MassPeaks object"))

## look for empty objects (isEmptyIdx == 3)
(isEmptyIdx <- findEmptyMassObjects(peakList))

## to remove all empty MassObjects from a list
length(peakList) # 3
peakList <- removeEmptyMassObjects(peakList)
length(peakList) # 2; WARNING: all indices could changed
# }

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