wsiFilter.massvector {mscalib} | R Documentation |
The function returns the inidces of masses identified as chemical noise.
## S3 method for class 'massvector': wsiFilter(object , mdist=0.25 , fraction=0.2 , ... )
... |
further arguments. |
fraction |
maximal fraction (nr masses in branch)/(length of massvector) of branche to be prune. |
mdist |
minimal distance to branch to be prune. The unit of this distance are Daltons. |
object |
massvector. |
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.
indices |
Indices of masses which are identified as being nonpeptide. |
Witold Wolski wolski@molgen.mpg.de
wsFilter.massvector
,
wsdist.massvector
,
wsFilter.massvectorlist
,
data(mv1) data(mv2) length(mv1) length(wsFilter(mv1)) length(mv2) length(wsFilter(mv2))