ExportROIAveragesMultiple: ExportROIAveragesMultiple.
In prafols/rMSIproc: MSI Processing in C++

Exports the ROI average spectrum for a data set of multiple images. If pkMat != NULL the CSV summary peak matrices will be exported as well.

ExportROIAveragesMultiple(
  img_list,
  xml_list,
  pkMat = NULL,
  out_path = getwd(),
  normalization = NULL
)

`img_list`	a lis of rMSI objects.
`xml_list`	a vector of XML ROI files in the same order as img_list.
`pkMat`	an rMSIproc peak matrix object.
`out_path`	disk path where the results will be stored.
`normalization`	a text string with the name of desired normalization to apply at output files.