安裝
install.packages("MALDIquant")
install.packages("MALDIquantForeign")
library("MALDIquant")
library("MALDIquantForeign")
查看MALDIquant包帶的數(shù)據(jù)
data(package='MALDIquant')
#Data sets in package ‘MALDIquant’:
#fiedler2009subset Example Mass Spectra (raw)
data(fiedler2009subset)
mode(fiedler2009subset)
#[1] "list"
length(fiedler2009subset)
#[1] 16
共有16個(gè)樣本
fiedler2009subset[1:2]
#$sPankreas_HB_L_061019_G10.M19.T_0209513_0020740_18
#S4 class type : MassSpectrum
#Number of m/z values : 42388
#Range of m/z values : 1000.015 - 9999.734
#Range of intensity values: 5 - 101840
#Memory usage : 506.359 KiB
#Name : Pankreas_HB_L_061019_G10.M19
#File : /data/set A - discovery #leipzig/control/Pankreas_HB_L_061019_G10/0_m19/1/1SLin/fid
#$sPankreas_HB_L_061019_G10.M20.T_0209513_0020740_18
#S4 class type : MassSpectrum
#Number of m/z values : 42388
#Range of m/z values : 1000.015 - 9999.734
#Range of intensity values: 6 - 111862
#Memory usage : 506.359 KiB
#Name : Pankreas_HB_L_061019_G10.M20
#File : /data/set A - discovery #leipzig/control/Pankreas_HB_L_061019_G10/0_m20/1/1SLin/fid
par(mfrow = c(2, 2))
plot(fiedler2009subset[[1]])
plot(fiedler2009subset[[2]])
plot(fiedler2009subset[[3]])
plot(fiedler2009subset[[4]])
Rplot01.png
標(biāo)準(zhǔn)化
減少峰的波動(dòng)，克服方差均值的相互影響
