trimMz-methods.RdThis method selects a range of MZ values in a single spectrum
(Spectrum instances) or all the spectra of an experiment
(MSnExp instances). The regions to trim are defined by the
range of mz argument, such that MZ values <= min(mz) and
MZ values >= max(mz) are trimmed away.
signature(object = "MSnExp", mz = "numeric", msLevel. =
"numeric")Trims all spectra in MSnExp object according
to mz. If msLevel. is defined, then only spectra of
that level are trimmer.
signature(object = "Spectrum", mz = "numeric",
msLevel. = "numeric")Trims the Spectrum object and
retruns a new trimmed object. msLevel. defines the level
of the spectrum, and if msLevel(object) != msLevel.,
cleaning is ignored. Only relevant when called from
OnDiskMSnExp and is only relevant for developers.
removePeaks and clean for other spectra
processing methods.
mz <- 1:100
sp1 <- new("Spectrum2",
mz = mz,
intensity = abs(rnorm(length(mz))))
sp2 <- trimMz(sp1, c(25, 75))
range(mz(sp1))
#> [1] 1 100
range(mz(sp2))
#> [1] 25 75
data(itraqdata)
itraqdata2 <- filterMz(itraqdata, c(113, 117))
range(mz(itraqdata))
#> [1] 99.99872 2069.27344
range(mz(itraqdata2))
#> [1] 113.0459 116.7362
processingData(itraqdata2)
#> - - - Processing information - - -
#> Data loaded: Wed May 11 18:54:39 2011
#> Updated from version 0.3.0 to 0.3.1 [Fri Jul 8 20:23:25 2016]
#> Filter: trim MZ [113..117] on MS level(s) 2.
#> MSnbase version: 1.1.22