`rescale(I(x), ...)`

and`rescale_mid(I(x), ...)`

return`I(x)`

unaltered (@teunbrand, #403).- Add a rescale method for
`difftime`

objects (#382) - Add better support for
`difftime`

objects.`label_timespan()`

adds functionality for adding correct unit suffix to timespan data,`breaks_timespan()`

adds functionality for finding pleasant breakpoints across the various bases in time units, while`transform_timespan()`

wraps it all together and provides an alternative to`transform_hms()`

(#212)

`train_continuous()`

coerces`new`

to numeric before calculating range (@teunbrand, #369).- Training on factor data no longer sorts the range after multiple training passes if the new
`fct`

argument of`train_discrete()`

is used (#383) - The
`DiscreteRange`

class now keeps track on whether it has been trained on factor data. - Attempt to make the sort behavior of the range consistent for character vectors during training. Mixing of character and factor data will make the factor level order take precedence no matter if the training starts with a charactor vector

- Transformation function have been renamed to
`transform_*`

-prefixed names instead of`*_trans`

-suffixed names. This allows for a better tab-completion search of transformations. The S3 class of transformations has been renamed from`"trans"`

to`"transform"`

.`new_transform()`

replaces`trans_new()`

and`trim_to_domain()`

replaces`trans_range()`

. All old functions are kept for posterity. `transform_sqrt()`

no longer returns an inverse for values outside of its domain (#214)- Add an inverse (area) hyperbolic sine transformation
`transform_asinh()`

, which provides a logarithm-like transformation of a space, but which accommodates negative values (#297) - Correct the domain calculation for
`transform_compose()`

(@mjskay, #408). - Transformation objects can optionally include the derivatives of the transform and the inverse transform (@mjskay, #322).

- The
`scale_cut`

argument in`number()`

now works as advertised for values below the lowest cut value (#346) `scale_cut`

will now choose a more appropriate cut in the case of the first cut creating an irrational-ish number.- Added a new option to the
`style_positive`

argument in`label_*()`

functions. Setting this to`"space"`

will add a figure space in front of the number to make it easier to align positive and negative values as figure space takes up the same amount of space as`-`

(#366) `label_dollar()`

has been superseeded by`label_currency()`

for clarity (#344)- Palette functions now have the
`pal_`

-prefix. The old`_pal`

-suffixed versions are kept for backward compatibility.

- Re-document to fix HTML issues in
`.Rd`

.

`label_number()`

:New

`style_positive`

and`style_negative`

argument control how positive and negative numbers are styled (#249, #262).The

`prefix`

comes after the negative sign, rather than before it, yielding (e.g) the correct`-$1`

instead of`$-1`

.New

`scale_cut`

argument enables independent scaling of different parts of the range. This is useful in`label_dollar()`

to support scaling of large numbers by suffix (e.g. “M” for million, “B” for billion). It can be used with`cut_short_scale()`

when billion = thousand million and`cut_long_scale()`

when billion = million million (initial implementation provided by @davidchall). Additionally, the accuracy is now computed per scale category, so rescaled values can have different numbers of decimal places (#339).`label_number_si()`

is deprecated because it previously used short scale abbreviations instead of the correct SI prefixes. You can mimic the previous results with`label_number(scale_cut = cut_scale_short())`

or get real SI labels with`label_number(scale_cut = cut_SI("m"))`

(#339, with help from @davidchall).

`label_bytes()`

now correctly accounts for the`scale`

argument when choosing auto units (@davidchall, #235).`label_date()`

and`label_time()`

gain a`locale`

argument that allows you to set the locale used to generate day and month names (#309).New

`label_log()`

displays the base and a superscript exponent, for use with logarithmic axes (@davidchall, #312).New

`compose_trans()`

allows arbitrary composition of transformers. This is mostly easily achieved by passing a character vector whenever you might previously have passed the name of a single transformer. For example,`scale_y_continuous(trans = c("log10", "reverse"))`

will create a reverse log-10 scale (#287).

`breaks_width()`

now supports units like`"3 months"`

in the`offset`

argument.`col_quantile()`

no longer errors if data is sufficiently skewed that we can’t generate the requested number of unique colours (#294).`dollar(negative_parens)`

is deprecated in favour of`style_negative = "parens"`

.`hue_pal()`

respects`h.start`

once again (#288).`label_number_auto()`

correctly formats single numbers that are greater than 1e+06 without an error (@karawoo, #321)`manual_pal()`

now always returns an unnamed colour vector, which is easy to use with`ggplot2::discrete_scale()`

(@yutannihilation, #284).`time_trans()`

and`date_trans()`

have`domains`

of the correct type so that they can be transformed without error (#298).Internal

`precision()`

, used when`accuracy = NULL`

, now avoids displaying unnecessary digits (@davidchall, #304).

`breaks_width()`

now handles`difftime`

/`hms`

objects (@bhogan-mitre, #244).`hue_pal()`

now correctly inverts color palettes when`direction = -1`

(@dpseidel, #252).Internal

`precision()`

, used when`accuracy = NULL`

, now does a better job when duplicate values are present (@teunbrand, #251). It also does a better job when there’s a mix of finite and non-finite values (#257).New

`oob_keep()`

to keep data outside range, allowing for zoom-limits when`oob_keep`

is used as`oob`

argument in scales. Existing out of bounds functions have been renamed with the`oob_`

-prefix to indicate their role (@teunbrand, #255).`ordinal_french()`

gains`plural`

and`gender`

arguments (@stephLH, #256).

Axis breaks and labels have a new naming scheme: functions that generate breaks from limits are called

`breaks_`

; functions that generate labels from breaks are called`labels_`

(#226).All breaks and labels examples have been overhauled to use new

`demo_continuous()`

,`demo_discrete()`

, and`demo_log10()`

, so you can see how to use scales functions with ggplot2.

All label functions preserve names (#202) and keep

`NA`

s as`NA`

s instead of trying to convert to`"NA"`

(@clauswilke, #187).New

`label_bytes()`

replaces`number_bytes_format()`

with a more convenient interface. It takes a single`unit`

argument which can either be an SI unit (e.g. “kB”), a binary unit (e.g. “kIB”), or an automatic unit (either “auto_si” or “auto_binary”).It always uses “B” as the symbol for bytes (#174), and checks that

`units`

are valid. Additionally, auto units are now used to determine the symbol separately for each value (@mikmart):New

`label_date_short()`

creates labels for a date axis that only show the components of the date that have changed since the previous label. For example, if you have Jan 10, Jan 20, Jan 30, and Feb 1,`label_date_short()`

will use labels Jan 10, 20, 30, Feb 1 (#209).`label_dollar()`

now correctly formats negative numbers as (e.g.) -$200 (#216).`label_math()`

now returns an expression vector, and doesn’t coerce inputs to names.`label_number()`

takes`scale`

into account when computing`accuracy`

, if not supplied. This means that`label_percent()`

should have better default accuracy in many cases (#192).`label_number()`

now picks the accuracy automatically by default. The underlying heuristic has been improved to use the distance between adjacent breaks (rather than the total range of the break).New

`label_number_auto()`

automatically picks between`number_format()`

and`scientific_format()`

based on the range of the input. It should produce nice output over a very wide range of inputs (@paleolimbot, #208).New

`label_number_si()`

formats numeric vectors with limited SI units. Individual values are scaled and labelled with abbreviations “K”, “M”, “B”, or “T” dependent on magnitude (@dpseidel, #83).`label_parse()`

now generates an expression object that can be used to display formatted labels in ggplot2 (@agila5, #203).`label_pvalue()`

now reports values close to 1 (as determined by`accuracy`

) as (e.g.) “>0.99”. You can control the prefixes used with the new`prefix`

argument (#213).

The built in breaks functions now returns a function that takes both a range and a desired number of breaks, making it possible to overwrite the defaults number of desired breaks given in the constructor call (@thomasp85).

`breaks_log()`

has nicer behaviour when there are no finite inputs (#210). It also provides usable breaks even with very small ranges (@billdenney, #168)New

`breaks_width()`

which allows you to specify a fixed distance between breaks (along with optional offset).

New

`yj_trans()`

implements the Yeo-Johnson transformation (@zamorarr, #196)`trans`

objects gets methods for`plot()`

and`lines()`

, and all numeric transformations get an example showing the transformation.`boxcox_trans()`

no longer throws an error when given NA values (@sflippl, #181).

scales now uses the farver package for colour manipulation instead of a combination of grDevices and hand-rolled C++ code (#223).

`alpha()`

now preserves element names (@wibeasley, #195)`ContinuousRange`

and`DiscreteRange`

methods now properly inherit and are fully mutable (@dpseidel).`col_numeric()`

,`col_bin()`

,`col_quantile()`

, and`col_factor()`

now support viridis colors. Just pass a palette name (`"magma"`

,`"inferno"`

,`"plasma"`

, or`"viridis"`

) as the`palette`

argument (@jcheng5, #191).`col_numeric()`

,`col_bin()`

,`col_quantile()`

, and`col_factor()`

now have a`reverse`

parameter, to apply color palettes in the opposite of their usual order (i.e. high-to-low instead of low-to-high) (@jcheng5, #191).`col_bin()`

and`col_quantile()`

now take a`right`

argument, which is passed to`base::cut()`

; it indicates whether the bin/quantile intervals should be closed on the right (and open on the left), or vice versa (@jcheng5, #191).`col_factor()`

now tries to avoid interpolating qualitative RColorBrewer palettes. Instead, it attempts to assign a palette color to each factor level. Interpolation will still be used if there are more factor levels than available colors, and a warning will be emitted in that case (@jcheng5, #191).`dichromat_pal()`

documentation now builds without requiring suggested`dichromat`

package to be installed (@dpseidel, #172).`date_breaks()`

now supports subsecond intervals (@dpseidel, #85).

`comma_format()`

,`percent_format()`

and`unit_format()`

gain new arguments:`accuracy`

,`scale`

,`prefix`

,`suffix`

,`decimal.mark`

,`big.mark`

(@larmarange, #146).`dollar_format()`

gains new arguments:`accuracy`

,`scale`

,`decimal.mark`

,`trim`

(@larmarange, #148).New

`number_bytes_format()`

and`number_bytes()`

format numeric vectors into byte measurements (@hrbrmstr, @dpseidel).New

`number_format()`

provides a generic formatter for numbers (@larmarange, #142).New

`pvalue_format()`

formats p-values (@larmarange, #145).`ordinal_format()`

gains new arguments:`prefix`

,`suffix`

,`big.mark`

,`rules`

; rules for French and Spanish are also provided (@larmarange, #149).`scientific_format()`

gains new arguments:`scale`

,`prefix`

,`suffix`

,`decimal.mark`

,`trim`

(@larmarange, #147).New

`time_format()`

formats`POSIXt`

and`hms`

objects (@dpseidel, #88).

`boxcox_trans()`

is now invertible for`x >= 0`

and requires positive values. A new argument`offset`

allows specification of both type-1 and type-2 Box-Cox transformations (@dpseidel, #103).`log_breaks()`

returns integer multiples of integer powers of base when finer breaks are needed (@ThierryO, #117).New function

`modulus_trans()`

implements the modulus transformation for positive and negative values (@dpseidel).New

`pseudo_log_trans()`

for transforming numerics into a signed logarithmic scale with a smooth transition to a linear scale around 0 (@lepennec, #106).

scales functions now work as expected when it is used inside a for loop. In previous package versions if a scales function was used with variable custom parameters inside a for loop, some of the parameters were not evaluated until the end of the loop, due to how R lazy evaluation works (@zeehio, #81).

`colour_ramp()`

now uses`alpha = TRUE`

by default (@clauswilke, #108).`date_breaks()`

now supports subsecond intervals (@dpseidel, #85).Removes

`dichromat`

and`plyr`

dependencies.`dichromat`

is now suggested (@dpseidel, #118).`expand_range()`

arguments`mul`

and`add`

now affect scales with a range of 0

(@dpseidel, ggplot2-2281).`extended_breaks()`

now allows user specification of the`labeling::extended()`

argument`only.loose`

to permit more flexible breaks specification (@dpseidel, #99).New

`rescale()`

and`rescale_mid()`

methods support`dist`

objects (@zeehio, #105).`rescale_mid()`

now properly handles NAs (@foo-bar-baz-qux, #104).

New function

`regular_minor_breaks()`

calculates minor breaks as a property of the transformation (@karawoo).Adds

`viridis_pal()`

for creating palettes with color maps from the viridisLite package (@karawoo).Switched from reference classes to R6 (#96).

`rescale()`

and`rescale_mid()`

are now S3 generics, and work with`numeric`

,`Date`

,`POSIXct`

,`POSIXlt`

and`bit64::integer64`

objects (@zeehio, #74).

`extended_breaks()`

no longer fails on pathological inputs.New

`hms_trans()`

for transforming hms time vectors.`train_discrete()`

gets a new`na.rm`

argument which controls whether`NA`

s are preserved or dropped.

Switched from

`NEWS`

to`NEWS.md`

.`manual_pal()`

produces a warning if n is greater than the number of values in the palette (@jrnold, #68).`precision(0)`

now returns 1, which means`percent(0)`

now returns 0% (#50).`scale_continuous()`

uses a more correct check for numeric values.NaN is correctly recognised as a missing value by the gradient palettes (ggplot2-1482).

`rescale()`

preserves missing values in input when the range of`x`

is (effectively) 0 (ggplot2-985).Continuous colour palettes now use

`colour_ramp()`

instead of`colorRamp()`

. This only supports interpolation in Lab colour space, but is hundreds of times faster.

`date_format()`

gains an option to specify time zone (#51).`dollar_format()`

is now more flexible and can add either prefixes or suffixes for different currencies (#53). It gains a`negative_parens`

argument to show negative values as`($100)`

and now passes missing values through unchanged (@dougmitarotonda, #40).New

`ordinal_format()`

generates ordinal numbers (1st, 2nd, etc) (@aaronwolen, #55).New

`unit_format()`

makes it easier to add units to labels, optionally scaling (@ThierryO, #46).New

`wrap_format()`

function to wrap character vectors to a desired width. (@jimhester, #37).

New color scaling functions

`col_numeric()`

,`col_bin()`

,`col_quantile()`

, and`col_factor()`

. These functions provide concise ways to map continuous or categorical values to color spectra.New

`colour_ramp()`

function for performing color interpolation in the CIELAB color space (like`grDevices::colorRamp(space = 'Lab')`

, but much faster).

`boxcox_trans()`

returns correct value when p is close to zero (#31).`dollar()`

and`percent()`

both correctly return a zero length string for zero length input (@BrianDiggs, #35).`brewer_pal()`

gains a`direction`

argument to easily invert the order of colours (@jiho, #36).`show_col()`

has additional options to showcase colors better (@jiho, #52).Relaxed tolerance in

`zero_range()`

to`.Machine$double.eps * 1000`

(#33).

Eliminate stringr dependency.

Fix outstanding errors in R CMD check.

`floor_time()`

calls`to_time()`

, but that function was moved into a function so it was no longer available in the scales namespace. Now`floor_time()`

has its own copy of that function (Thanks to Stefan Novak).Color palettes generated by

`brewer_pal()`

no longer give warnings when fewer than 3 colors are requested (@wch).`abs_area()`

and`rescale_max()`

functions have been added, for scaling the area of points to be proportional to their value. These are used by`scale_size_area()`

in ggplot2.

`zero_range()`

has improved behaviour thanks to Brian Diggs.`brewer_pal()`

complains if you give it an incorrect palette type. (Fixes #15, thanks to Jean-Olivier Irisson).`shape_pal()`

warns if asked for more than 6 values. (Fixes #16, thanks to Jean-Olivier Irisson).`time_trans()`

gains an optional argument`tz`

to specify the time zone to use for the times. If not specified, it will be guess from the first input with a non-null time zone.`date_trans()`

and`time_trans()`

now check that their inputs are of the correct type. This prevents ggplot2 scales from silently giving incorrect outputs when given incorrect inputs.Change the default breaks algorithm for

`cbreaks()`

and`trans_new()`

. Previously it was`pretty_breaks()`

, and now it’s`extended_breaks()`

, which uses the`extended()`

algorithm from the labeling package.fixed namespace problem with

`fullseq()`

.

`suppressWarnings`

from`train_continuous()`

so zero-row or all infinite data frames don’t potentially cause problems.check for zero-length colour in

`gradient_n_pal()`

.added

`extended_breaks()`

which implements an extension to Wilkinson’s labelling approach, as implemented in the`labeling`

package. This should generally produce nicer breaks than`pretty_breaks()`

.`alpha()`

can now preserve existing alpha values if`alpha()`

is missing.`log_breaks()`

always gives breaks evenly spaced on the log scale, never evenly spaced on the data scale. This will result in really bad breaks for some ranges (e.g 0.5-0.6), but you probably shouldn’t be using log scales in that situation anyway.

`censor()`

and`squish()`

gain`only.finite`

argument and default to operating only on finite values. This is needed for ggplot2, and reflects the use of Inf and -Inf as special values.`bounds`

functions now`force`

evaluation of range to avoid bug with S3 method dispatch inside primitive functions (e.g.`[`

).Simplified algorithm for

`discrete_range()`

that is robust to`stringsAsFactors`

global option. Now, the order of a factor will only be preserved if the full factor is the first object seen, and all subsequent inputs are subsets of the levels of the original factor.`scientific()`

ensures output is always in scientific format and off the specified number of significant digits.`comma()`

ensures output is never in scientific format (Fixes #7).Another tweak to

`zero_range()`

to better detect when a range has zero length (Fixes #6).