aov.ispd                Analysis of variance of data from an incomplete
                        split-plot design
cmis                    Data from an experiment using incomplete
                        split-plot design
imcs                    Data from an experiment using incomplete
                        split-plot design
imis                    Data from an experiment using incomplete
                        split-plot design
ispd                    Incomplete split-plot design for given number
                        of blocks, number of main plot treatments,
                        number of subplot treatments, number of main
                        plot treatments in blocks and / or number of
                        subplot treatments in main plots
