NEWS.md
S3 class igrouped_df which describes a grouping that can be inapplicable
Function group_by2() to create igrouped_df groupings
S3 methods ungroup(), format(), group_data() for igrouped_df
Function pivot_grps() for pivoting data using a group framework
Functions colgrp(), infer_colgrps(), and sep_colgrp() for column grouping
introduction vignette