"extractMatrix"(this, units=NULL, ..., field=c("intensities", "stdvs", "pixels"), returnUgcMap=FALSE, drop=FALSE, verbose=FALSE)NULL, all units are considered.subset() operating on the UGC map.TRUE, the (unit, group, cell) map is returned
as an attribute.TRUE, singleton dimensions are dropped.Verbose.*extractDataFrame().
For more information see ParameterCelSet.