This function returns the norm_info element of the data_info attribute indicating whether the data have been normalized.
get_data_norm(omicsObject)an object of the class 'pepData', 'proData', 'metabData',
'lipidData', 'nmrData', 'statRes', or 'trelliData', usually created by
as.pepData, as.proData,
as.metabData, as.lipidData,
as.nmrData, imd_anova, or
as.trelliData respectively.
A logical value indicating whether the data have been normalized.