groupval

groupval,xcmsSet-method

object


    conflict resolution method, <code>"medret"</code> to use the peak
    closest to the median retention time or <code>"maxint"</code> to use
    the peak with the highest intensity
  

method


    name of peak column to enter into returned matrix, or <code>"index"</code>
    for index to the corresponding row in the <code>peaks</code> slot
    matrix
  

value


    if <code>method == "maxint"</code>, name of peak column to use for
    intensity
  

intensity


  Generate a matrix of peak values with rows for every group and
  columns for every sample. The value included in the matrix can
  be any of the columns from the <code>xcmsSet</code> <code>peaks</code> slot
  matrix. Collisions where more than one peak from a single sample
  are in the same group get resolved with one of several user-selectable
  methods.


manip

methods

groupval-methods

Framework for processing and visualization of
chromatographically separated and single-spectra mass spectral data. Imports from
AIA/ANDI NetCDF, mzXML, mzData and mzML files. Preprocesses data for
high-throughput, untargeted analyte profiling.

Steffen Neumann

xcms

LC/MS and GC/MS Data Analysis

groupval-methods function

<dl>
<dt>object = "xcmsSet"</dt><dd>
  <code>groupval(object, method = c("medret", "maxint"),
                 value = "index", intensity = "into")</code>
</dd> </dl>

groupval-methods: Extract a matrix of peak values for each group

Description

Arguments

Value

Methods

See Also