exportVariableMetadata,proFIAset-method {proFIA} | R Documentation

## Export variable metadata.

### 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)
    }

[Package proFIA version 1.18.0 Index]