arrange_                Arrange your data.frames
expression_             Formula to be run on a data.frame given a group
filter_                 filter a data.frame
gather_                 Reshape a data.frame
group_by_               group_by a data.frame by chosen columns
left_join_              Join two data.frames
m61r                    Create m61r object
mutate_                 Mutate and transmutate a data.frame
select_                 select columns of a data.frame
summarise_              Summarise formula on groups
value_                  get or assign a value to a data.frame
