anchor                  Filter for a cell from which to select others
extend                  Extend a bag of cells in one direction,
                        optionally up to a boundary condition.
join_header             Join a bag of data cells to some header, by
                        proximity in a given direction, e.g. NNW
                        searches up and up-left from a data cell to
                        find a header cell.
offset                  Offset a bag of cells by some rows or columns.
pad                     Pad a bag of cells with blanks
purpose                 Sense-of-purpose in the 2014 New Zealand
                        General Social Survey
tidytable               Convert data frames into a tidy structure
unpivotr-package        Un-pivot complex and irregular data layouts.
