Identical unit division and multiplication will now respect

`units_options(simplify = FALSE)`

reverting a change from #310; #355 @billdenneyFix

`scale_units`

when both`unit`

and`trans`

are specified; #357

- Remove tolerance from comparisons with logical operators, restoring behavior changed in previous release; #353 addressing #351

Names are preserved when doing unit conversions; #305 @billdenney

Identical units will always divide (

`/`

) and allow integer division (`%/%`

). And, inverse units will always be able to multiply; #310 @billdenneyCompare units via

`ud_compare()`

, fixing inconsistent results for aliases and symbols; #339, #346, #347Fix

`units<-()`

to treat an empty unit the same as`NULL`

; #332New

`as.data.frame()`

method for`mixed_units`

; #309Use short paths for database loading on Windows to fix UTF-16 issues; #342

Add example in the docs about reversing a ggplot2 units scale; #343

Force storage mode to double; #344 addressing #324

Fix units in transformed axis; #323

Consider unitless as radians in trigonometric functions; #328

fix

`%/%`

and`%%`

if arguments have different units; #313fix multiplier parsing for

`exp(log(x))`

operations; #321fix specification of secondary axes with

`scale_units`

; #326

enhance unit mapping for newly installed units; #290

remove deprecations:

`install_symbolic_unit`

,`remove_symbolic_unit`

,`install_conversion_constant`

,`install_conversion_offset`

; #290fix multipliers for round trip log-exp operations; #292

integrate

`ggplot2`

scales (previously in the`ggforce`

package) to automatically print axes with units; #294 addressing #164fix

`all.equal.units`

for non-units`current`

fix zero power; #285

fix

`unique.units`

to support arrays and matrices, implement methods for`duplicated`

and`anyDuplicated`

fix plot labels with spaces; #298 addressing #297

always add units to labels, including user-provided ones; as part of #298

new symbols/names with a percentage character are not allowed due to an upstream bug; #289

enhance

`pillar`

integration; #273, #275, #280 @krlmlrnew

`unique`

method for`units`

and`mixed_units`

objects; #283 addressing #277 @lewinfox

allow longer units grouping; #270 addressing #269 @bart1

fix regression in

`set_units`

method for`mixed_units`

to ensure that ordering is preserved; #272 addressing #271

add

`load_units_xml`

to enable database reloading as well as loading user-provided unit systems; #254 addressing #243, #244add

`install_unit`

and`remove_unit`

for adding/removing custom user-defined symbols or names, with optional mapping to existing units;`install_symbolic_unit`

,`remove_symbolic_unit`

,`install_conversion_constant`

,`install_conversion_offset`

are deprecated; #261 addressing #89add

`keep_units`

, a helper to apply functions that do not preserve units; #255 addressing #252fix

`as_units("")`

, which is now equivalent to`unitless`

; #199fix plot axes for

`plot.formula`

and`plot.data.frame`

; #213fix arithmetic for powers above 1 and below -1; #264

improve arithmetic of logarithms; #249

export

`ud_are_convertible`

; #263 addressing #258 @cregoubyremove deprecations:

`as.units`

,`as_cf`

,`make_unit`

,`parse_unit`

; #259remove deprecated pre-computed

`ud_units`

database; #259

port

`isFALSE`

to fix regression in old R versions; #230 addressing #229fix replacement operation for

`units`

objects; #233 addressing #232fix compatibility with dplyr 1.0; #247 addressing #239

prettier

`str`

print for units and mixed units; #228 addressing #227add compatibility with upcoming tibble v3.0.0; #225

- skip test on CRAN to avoid issues with strict latin1 environments

fix support for weights with units in

`weighted.mean`

; #205invalid names for new units now trigger a proper error message; #209 addressing #208

fix issues in strict latin1 environments; #202

improve platform dependent encodings handling; #183

don’t force

`as.numeric`

when unnecessary; #182 addressing #181fix valgrind issues on CRAN and tidy up tests; #193 addressing #192

new method

`drop_units`

for data frames; #191 addressing #187

- fix support for logarithms and decibels; #177 addressing #176
- add delayed S3 registration mechanism for R >= 3.6.0

vectors with mixed units are now supported; #145

`NA`

values for units now trigger a proper error message; #163

print units as [unit] more consistently, e.g. for single unit and in data.frames; #132

improve printing of unitless units; provide option to print something else than 1; #150

fix printing unitless in labels when

`negative_power`

is`TRUE`

; #133`install_symbolic_unit`

now adds a dimensionless unit, integrated in the units system, meaning that prefixes on it work as well; #71`install_conversion_constant`

and`install_conversion_offset`

now install a new unit that is a function of an existing udunits unit.; #71, #84unit simplification can now be user-controlled by

`units_options`

; #89`set_units(15, mg/kg)`

is now no longer simplified to 1e-9 unitless; #89directly uses the udunits2 C library; drop dependence on R package

`udunits2`

, fixing R package`udunits2`

memory leaks; #135drops

`%*%`

, no longer gives warning when loading

deal with trigonometric functions for units degree; return units rad on inverse trigonometric functions.

Unit creation has been significantly refactored.

`units<-`

now accepts strings or quoted language objects on the right hand side, powered by new S3 methods for`as_units`

. All valid unit symbols and unit names recognized by package ‘udunits2’ are now accepted. New user facing function`make_units()`

(plural s) is also provided. See`?as_units`

for details. @t-kalinowskinew functions

`valid_udunits()`

and`valid_udunits_prefixes()`

generate tidy dataframes listing all the valid unit names, symbols, and prefixes recognized by udunits. @t-kalinowskinew function

`install_symbolic_unit()`

for adding custom, user-defined units. @t-kalinowski`make_unit`

and`parse_unit`

(singular unit) have been deprecated, please use`as_units`

instead.`ud_units`

is no longer necessary and is soft-deprecated, and may be removed in a future release.add

`%*%`

as an S3 generic; #54add

`%%`

and`%/%`

to`Ops.units`

support unary + and - ; #56

add

`seq`

method for`units`

, converting units to those of the first argumentDeprecate

`as.dt`

for`as_difftime`

,`as.units`

for`as_units`

and`as_cf`

for`deparse_unit`

add

`all.equal`

method for`units`

; #51add

`deparse_unit`

to replace`as_cf`

add calender/time conversions between

`udunits`

time units like`minutes from 1900-0-0`

, and R’s`POSIXct`

and`Date`

add

`as_units`

to replace`as.units`

rename

`as.dt`

to`as_difftime`

add support for user-defined unit conversion; #31

allow for 1/n integer powers, as in

`set_units(1:10, m^-2) ^ 0.5`

; #29properly set log units after log transform; #33

`sin`

,`cos`

and`tan`

no longer complain when units is`rad`

, and return`unitless`

; #40now allow for

`set_units(1:3, "°C")`

and also`set_units(1:3, "degree_Celsius")`

by resolving names to symbols first; #43`set_units(x)`

with`x`

numeric sets units to`unitless`

; #41

fix a result units bug when multiplying or dividing units vectors of different length, #34

add a

`rep`

method for`units`

vectors

- support for
`set_units(1:10, m)`

which does not require to declare or define,`m`

(`m`

is resolved automatically from`ud_units`

)