exportVariableMetadata-proFIAset-method: Export variable metadata.

In proFIA: Preprocessing of FIA-HRMS data

Description

Export the variable metadata of an experiment, to be used for statistical analysis.

Usage

## S4 method for signature 'proFIAset'
exportVariableMetadata(object, filename = NULL)

Arguments

object	A proFIAset object.
filename	If not NULL the result will be written in filename

Value

A dataframe with the following columns :

• variableID an ID similar to the one of the peak table.

• mzMed the median value of group in the m/z dimension.

• mzMin the minimum value of the group in the m/z dimension.

• mzMax the maximum value of the group in the m/z dimension.

• scanMin the first scan on which the signal is detected.

• scanMax the last scan on which the signal is detected.

• nPeaks The number of peaks grouped in a group.

• meanSolvent The mean of solvent in the acquisition.

• signalOverSolventPvalue The mean p-value of the group.

• corMean The mean of the matrix effect indicator.

• SigSolMean The mean of ratio of the signal max intensity on the solvent max intensity.

Examples

if(require(plasFIA)){
  data(plasSet)
  vtab<-exportVariableMetadata(plasSet)
  head(vtab)
}

proFIA documentation built on March 20, 2021, 6 p.m.