scales 1.2.0

New features

• 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).

Bug fixes and minor improvements

• 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).