🐈🐈🐈🐈: tools for working with categorical variables (factors)
fct_na_value_to_level() and fct_na_level_to_value() to convert
NA values to NA levels and vice versa (#337).All functions now validate their inputs, giving more useful errors if you accidentally misspecify an input.
fct_collapse() can now use other_level = NA (#291).
fct_count() works with factors that contain NAs in levels.
fct_explicit_na() is deprecated in favour of fct_na_value_to_level().
fct_expand() gains an after argument so that you can choose where
the new levels are placed (#138).
fct_infreq() gains the ability to weight by another variable using the w
argument (#261).
fct_inorder() now works when not all levels appear in the data (#262).
fct_lump_prop() and friends now work correctly if you supply weights
and have empty levels (#292).
fct_lump_n() and fct_lump_prop() will now create an "Other" level even
if it only consists of a single level. This makes them consistent with the
other fct_lump_* functions (#274).
fct_other() no longer generates a warning if no levels are replaced with
other (#265).
fct_relevel(), fct_cross(), and fct_expand() now error if you name the
arguments in ... since those names are ignored and your code probably
doesn't do what you think it does (#319).
fct_reorder() and fct_reorder2() now remove NA values in .x with a
warning (like ggplot2::geom_point() and friends). You can suppress the
warning by setting .na_rm = TRUE (#315).
fct_reorder() and fct_reorder2() gain a new .default argument that
controls the placement of empty levels (including levels that might become
empty after removing missing values in .x) (#266).
fct_unique() now captures implicit missing values if present (#293).
New fct() which works like factor() but errors if values of x
are not included in the levels specification (#299)
first2() and last2() now ignore missing values in both x and y (#303).
Error messages are more informative.
Re-license as MIT (#277).
fct_lump_n() no longer uses a partial argument name (@malcolmbarrett, #276).
as_factor() gains a logical method that always returns a factor with
levels "FALSE" and "TRUE" (#185).
fct_c(), fct_collapse() and fct_recode() are now explicitly
documented as using dynamic dots
(@labouz, #234).
fct_collapse() now accepts a other_level argument, to allow a
user-specified Other level (@gtm19, #194). It now correctly collapses
factors when other_level is not NULL (#172), and makes "Other" the
last level (#202) (@gtm19, #172 & #202)
fct_count() no longer converts implicit NAs into explicit NAs (#151).
fct_inseq() behaves more robustly when factor levels aren't all numbers
(#221).
fct_lump() has been split up into three new functions: fct_lump_prop(),
fct_lump_n(), and fct_lump_lowfreq(). (@jonocarroll, #167, #142).
All fct_lump_() functions check their inputs more carefully
(@robinson_es, #169)
fct_reorder2() gains a helper function first2(), that sorts .y by the
first value of .x (@jtr13).
fct_collapse() gains a group_other argument to allow you to group all
un-named levels into "Other". (#100, @AmeliaMN)
fct_cross() creates a new factor containing the combined levels from two
or more input factors, similar to base::interaction (@tslumley, #136)
fct_inseq() reorders labels in numeric order, if possible (#145, @kbodwin).
fct_lump_min() preserves levels that appear at least min times (can also
be used with the w weighted argument) (@robinsones, #142).
fct_match() performs validated matching, providing a safer alternative to
f %in% c("x", "y") which silently returns FALSE if "x" or "y"
are not levels of f (e.g. because of a typo) (#126, @jonocarroll).
fct_relevel() can now level factors using a function that is passed the
current levels (#117).
as_factor() now has a numeric method. By default, orders factors in numeric
order, unlike the other methods which default to order of appearance.
(#145, @kbodwin)
fct_count() gains a parameter to also compute the proportion
(@zhiiiyang, #146).
fct_lump() now does not change the label if no lumping occurs
(@zhiiiyang, #130).
fct_relabel() now accepts character input.
fct_reorder() and fct_reorder2() no longer require that the summary
function return a numeric vector of length 1; instead it can return any
orderable vector of length 1 (#147).
fct_reorder(), fct_reorder2() and as_factor() now use the ellipsis
package to warn if you pass in named components to ... (#174).
fct_c() now requires explicit splicing with !!! if you have a
list of factors that you want to combine. This is consistent with an emerging
standards for handling ... throughout the tidyverse.
fct_reorder() and fct_reorder2() have renamed fun to .fun to
avoid spurious matching of named arguments.
All functions that take ... use "tidy" dots: this means that you use can
!!! to splice in a list of values, and trailing empty arguments are
automatically removed. Additionally, all other arguments gain a . prefix
in order to avoid unhelpful matching of named arguments (#110).
fct_lump() gains w argument (#70, @wilkox) to weight value
frequencies before lumping them together (#68).
as_factor() and fct_inorder() accept NA levels (#98).
fct_explicit_na() also replaces NAs encoded in levels.
fct_lump() correctly acccounts for NA values in input (#41)
lvls_revalue() preserves NA levels.
Test coverage increased from 80% to 99%.
fct_drop() now preserves attributes (#83).
fct_expand() and lvls_expand() now also take character vectors (#99).
fct_relabel() now accepts objects coercible to functions
by rlang::as_function (#91, @alistaire47)
as_factor() which works like as.factor() but orders levels by
appearance to avoid differences between locales (#39).fct_other() makes it easier to convert selected levels to "other" (#40)fct_relabel() allows programmatic relabeling of levels (#50, @krlmlr).fct_c() can take either a list of factors or individual factors (#42).fct_drop() gains only argument to restrict which levels are dropped (#69)
and no longer adds NA level if not present (#52).fct_recode() is now checks that each new value is of length 1 (#56).fct_relevel() gains after argument so you can also move levels
to the end (or any other position you like) (#29).lvls_reorder(), fct_inorder(), and fct_infreq() gain an ordered
argument, allowing you to override the existing "ordered" status (#54).