MS {IDPmisc} | R Documentation |
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)
Format
A data frame with 45213 observations on the following 2 variables.
mz
mass / charge
I
Intensity
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.
Source
Medical research project.
Examples
data(MS)
MS1 <- log10(MS[MS$mz>12000&MS$mz<1e5,])
P <- peaks(MS1, minPH=0.025, minPW=0.0015)
plot(MS1, ty="l", xlim=c(4.15,5))
points(P,col="red")
[Package IDPmisc version 1.1.21 Index]