OptionalgroupBetween-subjects group labels, parallel to the rows of y (the residuals are taken from the group means).
OptionalidataThe within-subject design: a data frame with one row per column of y. Default: a column index = 1 ... k.
OptionalMFormula over idata whose model matrix spans the space tested. Default: all k dimensions (the identity).
OptionalXFormula over idata whose space is projected out. Default "~0" (nothing).
Options for mauchlyTest.