wsFilter.massvector {mscalib} | R Documentation |
Removes chemical noise from the massvectorlist.
## S3 method for class 'massvector': wsFilter(object,mdist=0.25,fraction=0.2, peptides=TRUE,...)
... |
further parameters. |
fraction |
maximal size of branche (nr masses in branch)/(length of massvector) to be cut. |
mdist |
minimal distance of branch to be cut. |
object |
massvector. |
peptides |
TRUE - returns peptides, FALSE - returns chemical noise. |
Chemical noise can be removed from the peptide mass lists due to the strong clustering of mono-isotopic peptide peaks. Following the distance measure and filtering method proposed by Wool Smilanski we developed an algorithm to classify masses as peptide and non-peptide. The algorithm is based on a modified distance measure and hierarchical clustering of all intra massvector distances.
massvector |
returns either a massvector of nonpeptide masses or massvector of peptide masses. |
Witold Wolski wolski@molgen.mpg.de
wsiFilter.massvector
,
wsFilter.massvectorlist
,
data(mv1) tmp <- wsFilter(mv1,peptide=FALSE) plot(tmp) tmp <- wsFilter(mv1,peptide=TRUE) plot(tmp)