eicmatrix: Generate matrix of combined extraced ion chromatograms (EICs)
In cosmiq: cosmiq - COmbining Single Masses Into Quantities

Description Usage Arguments Details Author(s) Examples

for each selected mass window, eicmatrix calculates EICs of every raw file and combines them together. It is recommended to correct the retention time first using retcor.obiwarp

1	eicmatrix(xs, xy, center)

`xs`	xcmsSet object
`xy`	table including mz location parameters
`center`	file number which is used as a template for retention time correction

For each detected mass, an extracted ion chromatogram (EIC) is calculated. In order to determine the elution time for each detected mass, the EICs of every mass are combined between all acquired runs.

Make sure that xcms-retention time correction (centwave) was applied to the dataset. The output will be a matrix of EIC's

David Fischer 2013

      ## Not run: 
    #  see package vignette section 
    # 'Generation and combination of extracted ion chromatograms'
    xs<-create_datamatrix(xs=xs, rxy=rxy)
      
## End(Not run)