IDPmisc (version 0.9.3)

MS: Spectrum Measured by a SELDI TOF Mass Spectrometer

Description

The spectrum was taken from a sample of sheep blood. The instrument used was a so called SELDI TOF (Surface Enhanced Laser Desorption Ionisation, Time Of Flight) Mass Spectrometer.

Usage

data(MS)

source

Medical research project.

Details

The measured masses lie between m/z=1000 and 200000. The intensities are raw output. Neither smoothing nor background subtraction was applied to the spectrum.

Examples

data(MS)

MS <- log10(MS[MS$mz>12000&MS$mz<1e5,])
P <- peaks(MS, minPH=0.025, minPW=0.0015)

plot(MS, ty="l", xlim=c(4.15,5))
abline(v=P$x,col="blue", lwd=1)