Rigroup                 package to calculate selected basic statistics
                        for each group
igroupAlls              calculates logical All for small integer groups
                        of logical vectors
igroupAnys              calculates logical Any for small integer groups
                        of logical vectors
igroupCounts            calculate Counts for small integer groups
igroupMaxs              calculate maximum for small integer groups
igroupMeans             calculate means for small integer groups
igroupMins              calculate minimums for small integer groups
igroupProds             calculate products for small integer groups
igroupRanges            calculate ranges for small integer groups
igroupSums              calculate Sums for small integer groups
