gamasses.massvectorlist {mscalib} | R Documentation |
Determines abundant masses in a massvector.
## S3 method for class 'massvectorlist': gamasses(object,accur=0.1,abund=50,...)
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abund |
how many times a mass have to occur to be an abundant mass. |
accur |
measurment accuracy |
object |
massvectorlist |
Abundant masses are masses that occur in a large fraction of the massvectors. Typical abundant mass are derived from tryptic autoproteolysis products. Abundant masses can also often be assigned to keratin isoforms (human hair- and skin proteins). Many of the abundant masses cannot be assigned to any protein. Abundant masses can be used for calibration. Removing them may increase the identification specificity.
massvector |
massvector with abundant masses. |
Witold Wolski wolski@molgen.mpg.de
data(mvl) #Filtering for abundant masses. res<-gamasses(mvl,abund=50) plot(res) mvFilter(mvl[[1]],res) res2<-mvFilter(mvl,res,abundant=TRUE) image(res2,what="lengthmv") image(mvl,what="lengthmv") image(image(res2,what="lengthmv")/image(mvl,what="lengthmv")) hist(mvl,accur=0.3) hist(res2,add=TRUE,col=2,accur=0.3)