slice_rows() is equivalent to dplyr's
group_by() command but it takes a vector of
column names or positions instead of capturing column names with
special evaluation. unslice() removes the slicing
attributes.
Usage
slice_rows(.d, .cols = NULL)
unslice(.d)
Arguments
.d
A data frame to slice or unslice.
.cols
A character vector of column names or a numeric vector
of column positions. If NULL, the slicing attributes are
removed.