R: Spectrum Measured by a SELDI TOF Mass Spectrometer
MS
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.
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
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> library(IDPmisc)
Loading required package: grid
Loading required package: lattice
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/IDPmisc/MS.Rd_%03d_medium.png", width=480, height=480)
> ### Name: MS
> ### Title: Spectrum Measured by a SELDI TOF Mass Spectrometer
> ### Aliases: MS
> ### Keywords: datasets
>
> ### ** 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")
>
>
>
>
>
>
> dev.off()
null device
1
>