# version 0.7-1
* 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
# version 0.7-0
* add `load_units_xml` to enable database reloading as well as loading
user-provided unit systems; #254 addressing #243, #244
* add `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 #89
* add `keep_units`, a helper to apply functions that do not preserve units;
#255 addressing #252
* fix `as_units("")`, which is now equivalent to `unitless`; #199
* fix plot axes for `plot.formula` and `plot.data.frame`; #213
* fix arithmetic for powers above 1 and below -1; #264
* improve arithmetic of logarithms; #249
* export `ud_are_convertible`; #263 addressing #258 @cregouby
* remove deprecations: `as.units`, `as_cf`, `make_unit`, `parse_unit`; #259
* remove deprecated pre-computed `ud_units` database; #259
# version 0.6-7
* port `isFALSE` to fix regression in old R versions; #230 addressing #229
* fix replacement operation for `units` objects; #233 addressing #232
* fix compatibility with dplyr 1.0; #247 addressing #239
# version 0.6-6
* prettier `str` print for units and mixed units; #228 addressing #227
* add compatibility with upcoming tibble v3.0.0; #225
Support for measurement units in R vectors, matrices and arrays:
automatic propagation, conversion, derivation and simplification of
units; raising errors in case of unit incompatibility. Compatible with
the POSIXct, Date and difftime classes. Uses the UNIDATA udunits
library and unit database for unit compatibility checking and
conversion.
