rsample-dplyr | R Documentation |
This page lays out the compatibility between rsample and dplyr. The rset
objects from rsample are a specific subclass of tibbles, hence standard
dplyr operations like joins as well row or column modifications work.
However, whether the operation returns an rset or a tibble depends on the
details of the operation.
The overarching principle is that any operation which leaves the specific
characteristics of an rset intact will return an rset. If an operation
modifies any of the following characteristics, the result will be a tibble
rather than an rset
:
Rows: The number of rows needs to remain unchanged to retain the rset property. For example, you can't have a 10-fold CV object without 10 rows. The order of the rows can be changed though and the object remains an rset.
Columns: The splits
column and the id
column(s) are required for an
rset and need to remain untouched. They cannot be dropped, renamed, or
modified if the result should remain an rset.
The following affect all of the dplyr joins, such as left_join()
,
right_join()
, full_join()
, and inner_join()
.
The resulting object is an rset
if the number of rows is unaffected.
Rows can be reordered but not added or removed, otherwise the resulting object
is a tibble
.
operation | same rows, possibly reordered | add or remove rows |
join(rset, tbl) | rset | tibble |
The resulting object is an rset
if the number of rows is unaffected.
Rows can be reordered but not added or removed, otherwise the resulting object
is a tibble
.
operation | same rows, possibly reordered | add or remove rows |
rset[ind,] | rset | tibble |
slice(rset) | rset | tibble |
filter(rset) | rset | tibble |
arrange(rset) | rset | tibble |
The resulting object is an rset
if the required splits
and id
columns
remain unaltered. Otherwise the resulting object is a tibble
.
operation | required columns unaltered | required columns removed, renamed, or modified |
rset[,ind] | rset | tibble |
select(rset) | rset | tibble |
rename(rset) | rset | tibble |
mutate(rset) | rset | tibble |
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