swh:1:snp:ec9123555d9a820c2a2c639b94d28734563df6e0
Tip revision: 47585523bc3017903be49327bb50724c270b6946 authored by Achim Zeileis on 04 May 2021, 04:30:12 UTC
version 2.0-1
version 2.0-1
Tip revision: 4758552
NEWS.md
# colorspace 2.0-1
* Added two new palettes from the viridis family (_viridis_/_viridisLite_),
namely `"Rocket"` and `"Mako"` in `sequential_hcl()`.
* Assure that all `do.call()` for the `ggplot2` scale functions are made with
`envir = parent.frame()` in order to avoid problems with non-standard
evaluation, as reported in:
<https://stackoverflow.com/questions/66049336/paste-name-in-scale-fill-color-in-colorspace-does-not-work-in-a-loop>
* New function `extract_transparency()` for extracting alpha transparency
from color specifications, either as numeric, integer, character or hexmode vectors.
This accompanies the previously available function `adjust_transparency()`
allowing for more flexible modifications of alpha transparencies in colors.
# colorspace 2.0-0
* Release of version 2.0-0 accompanying the publication of the paper
"colorspace: A Toolbox for Manipulating and Assessing Colors and Palettes"
in the _Journal of Statistcal Software_ at <https://doi.org/10.18637/jss.v096.i01>.
The paper is a compact version of the package web page
(<https://colorspace.R-Forge.R-project.org/>) including some more discussion
of related methods and software along with some more references to the
scientific literature.
* New function `adjust_transparency()` that adjusts the alpha transparency
of some color specification and returns a hexadecimal string where
the alpha component is modified, added, or removed.
* Added three more palettes from Fabio Crameri's scientific color maps
(_scico_), namely `"Hawaii"` and `"Batlow"` in `sequential_hcl()` and
`"Roma"` in `divergingx_hcl()`.
* Additional option `cvd` in `swatchplot()` so that color vision deficiency
emulation can be included on the fly.
* Added _binned_ _ggplot2_ color scales (in addition to _discrete_ and
_continuous_).
* Changed the default colors in `specplot()` from `rainbow_hcl(3)` to
`qualitative_hcl(3)` which is darker and has more chroma. Also, the order
of the legend has been reversed (Luminance / Chroma / Hue) so that the
legend labels are closer to the axis that they pertain to.
* Improve the documentation of the `LUV()` and `LAB()` color spaces,
pointing out that the `U`/`V` and `A`/`B` coordinates are _typically_
in [-100, 100] but can actually be exceeded by highly saturated colors.
* Bug fix in `diverging_hcl()` and `divergingx_hcl()` where the central color
of the diverging palette could sometimes collapse to transparent white
due to numerical inaccuracies on 32-bit platforms.
* Improve the documentation of the `HSV()` and `HLS()` color spaces.
These do NOT necessarily correspond to sRGB; we can convert from
these to any RGB space that we choose (linear or non-linear,
any whitepoint). In particular, if we want to convert from one of
these color spaces to XYZ or beyond, we must first convert to a
specific RGB color space.
# colorspace 1.4-1
* New article/vignette "Somewhere over the Rainbow" with published examples
of RGB rainbow palettes (or similar highly saturated and non-monotonic
palettes).
* Bug fix in `divergingx_hcl(n)` with even `n` where the two central colors
were erroneously duplicated. Also, partial matching of palette names has
been fixed.
* New sequential multi-hue palette: Purple-Yellow. This is a slightly
improved version (i.e., with higher luminance contrast) of the palette
used in Figure 4 of [Stauffer _et al._ (2015, BAMS)](https://doi.org/10.1175/BAMS-D-13-00155.1).
* New flexible diverging palette Zissou 1 in `divergingx_hcl()`. This closely
matches the palette of the same name in _wesanderson_. Note that this is
rather unbalanced, has relatively low luminance contrasts and uses very
high chroma throughout.
* New palette Cividis in `divergingx_hcl()` approximating the palette of
the same name from the viridis family. While luminance increases monotonically
from dark to light in the palette (thus indicating a _sequential_ and not
a _diverging_ palette), the hue and chroma trajectories resemble a
diverging pattern. Therefore, the flexibility of `divergingx_hcl()` is
needed and the palette could not be approximated by `sequential_hcl()`.
* Limits of hue axis are improved in `specplot()`. Previously, the hues
were always matched to [0, 100] on the chroma/luminance axis. Now they
are matched to [0, maximum chroma].
# colorspace 1.4-0
* Major update of the package that enhances many of its capabilities,
e.g., more refined palettes, named palettes, _ggplot2_ color scales,
visualizations for assessing palettes, more and enhanced shiny and
Tcl/Tk apps, color vision deficiency emulation, and much more. See
below for further details. A new web site presenting and documenting
the package has been launched at https://colorspace.R-Forge.R-project.org/
* Claus O. Wilke and Claire D. McWhite joined the _colorspace_ team,
adding and enhancing various features, including (but not limited to)
especially the color vision deficiency emulation, the _ggplot2_ palettes,
and new shiny apps.
* New function `simulate_cvd()` for simulating color vision deficiencies
with convenience interfaces `deutan()`, `protan()`, and `tritan()`.
* New function `hcl_palettes()` to query pre-defined HCL-based palettes:
qualitative, sequential (single-hue), sequential (multi-hue),
diverging. The corresponding `print()`, `plot()`, and `summary()` methods
can help to explore the palettes.
* Pre-defined HCL palettes are taken from previous publications about colorspace
as well as approximations from other packages (ColorBrewer.org, CARTO,
viridis, scico).
* Users can also register their own custom color palettes for subsequent
usage (within the same session) in `qualitative_hcl()`, `sequential_hcl()`,
and `diverging_hcl()` using the `register = "..."` argument. To generally
make such custom palettes available, a registration R code a la
`colorspace::qualitative_hcl(..., register = "myname")` can be placed in
the `.Rprofile` or similar startup scripts. Also the `choose_color()`/`hclwizard()`
app allows to register palettes in the current session.
* New and more flexible `qualitative_hcl()` palette function. This is
similar to the old `rainbow_hcl()` but allows to use the pre-defined
palettes and change the parameters more easily.
* Palette function `sequential_hcl()` is now substantially more flexible:
encompasses both single-hue and multi-hue palettes; gained a new
parameter `cmax` for non-monotonic chroma paths. Parameters `h1`, `h2`,
`c1`, `c2`, `l1`, `l2`, `p1`, `p2`, `cmax` allow to easily modify
existing palettes in just a few HCL parameters.
* Function `diverging_hcl()` is introduced as a copy of `diverge_hcl()`
for a more consistent naming of the *_hcl palettes where * is one of
the adjectives "qualitative", "sequential", and "diverging". Both
`diverging_hcl()` and `diverge_hcl()` now also gained a `cmax` argument
just like `sequential_hcl()`. Individual parameters `h1`, `h2`, `c1`,
`l1`, `l2`, `p1`, `p2` can also be easily modified.
* New functions `divergingx_hcl()`/`divergex_hcl()` have been added for
fully fle_x_ible diverging palettes (as opposed to the more restricted
balanced palettes in `diverging_hcl()`/`diverge_hcl()`). These support parameters
`h1`, `h2`, `h3`, `c1`, `c2`, `c3`, `l1`, `l2`, `l3`, `p1`, `p2`, `p3`,
`p4`, `cmax1`, `cmax2`.
* Many new predefined palettes that facilitate close approximation of
almost all palettes from _ColorBrewer.org_/_RColorBrewer_, _CARTO_/_rcartocolor_,
and viridis. Additionally, approximations to a few of Fabio Crameri's
scientific color maps (_scico_) are available as well.
* New interactive shiny app `hcl_color_picker()` - or equivalently,
`choose_color()` - for exploring HCL colors, and manually assembling
individual colors or palettes. Douglas C. Wu (@wckdouglas) provided the
original implementation for the color palette feature.
* New functions `lighten()` and `darken()` for programatically lightening
and darkening colors.
* New convenience function `swatchplot()` that facilitates displaying
color swatches to display and compare collections of color palettes.
* `specplot()` gained an argument `y=NULL` to optionally display a second
palette and compare their trajectories. By default, `specplot()` now
only shows the HCL spectrum but not the RGB spectrum (`rgb = FALSE`)
because it is mainly used for illustrating and comparing properties
of HCL-based palettes.
* New function `hclplot()` for visualizing trajectories of color palettes
in two-dimensional HCL space projections.
* New function `demoplot()` that makes the demonstration plots (map,
heatmap, pie, lines, etc.) from the `choose_palette()`/`hclwizard()`
app available outside the GUI on the command line.
* Added a new function `max_chroma()` that (approximately) computes
the maximum chroma possible for a given hue and luminance
combination in HCL space.
* Registration of C routines.
* In `LAB_to_XYZ` conversion, replace decimal approximations with exact
rational numbers (reported by Glenn Davis). Follows Bruce Lindbloom:
<http://brucelindbloom.com/index.html?LContinuity.html>
* New function `whitepoint()` that can both query the current whitepoint
and set it to a different value. By default CIE D65 with XYZ
coordinates 95.047, 100.000, 108.883 is used. But it is possible
to set another global whitepoint now, used for all conversions in
the package (suggested by Glenn Davis).
* Fixed a bug in `desaturate()` for named colors (such as `"gray92"`)
where erroneously the `RGB()` rather than `sRGB()` model was used
internally.
* Added argument `desaturate(..., amount = 1)` for optional partial
desaturation.
# colorspace 1.3-2
* Fixed error in `as_HLS()`, which was passing `ans` rather than
`color` as the colour to convert (and that was producing not only
wrong results, but random results because the values in `ans` were
not initialized). Thanks to Thomas Julou for the report.
# colorspace 1.3-1
* Fixed erroneous use of `return` rather than `return()` in
`choose_palette()`/`hclwizard()`.
# colorspace 1.3-0
* In addition to the Tcl/Tk-based GUI for `choose_palette()` there is now
a shiny-based GUI. `choose_palette()` by default still uses the Tcl/Tk
version while `hclwizard()` is a new wrapper that by default calls the
new shiny version.
* New function `specplot()` that converts a given palette in hex codes
to RGB and HCL coordinates and visualizes their spectrum as a line
plot.
* `hex2RGB()` now omits the alpha channel (if any) in the hex colors
provided.
# colorspace 1.2-7
* Extended `choose_palette()` for sequential palettes with multiple hues:
Now two palettes are included in the examples that are very close
to "viridis" and "magma" from matplotlib in Python (also available
in R via package _viridis_)
* Changed Depends/Imports/Suggests to conform with current R CMD check.
# colorspace 1.2-6
* Moved _tcltk_ again from Imports to Suggests to facilitate usage of
colorspace on platforms where tcltk is not available.
# colorspace 1.2-5
* Changed Depends/Imports/Suggests to conform with current R CMD check.
# colorspace 1.2-4
* Bug fix for `choose_palette()` when using palette functions with
optional alpha channels.
# colorspace 1.2-3
* Alpha channel is preserved in desaturate for named colors (especially
`"transparent"` and `NA`). (Reported by Simon Potter.)
* Added alpha argument for all palette functions (see `?rainbow_hcl`).
* Small fixups for R CMD check.
# colorspace 1.2-2
* Names of colors are preserved in `hex()` and `hex2RGB()` now. (Reported
by Richard Cotton.)
# colorspace 1.2-1
* If a new version of the _dichromat_ package (> 1.2-4) with tritan
support is found, this is interfaced in `choose_palette()`.
# colorspace 1.2-0
* New Tcl/Tk-based GUI for choosing different types of palettes:
qualitative (`rainbow_hcl`), single-hue sequential (`sequential_hcl`),
multi-hue sequential (`heat_hcl`), and diverging (`diverge_hcl`). The
GUI provides a wide collection of pre-stored palettes, easy
manipulation of the corresponding arguments, illustration through
a broad range of plot types (maps, heatmaps, variations of bar plots,
scatter plots, and many more), emulation of desaturation and
dichromatic vision, loading/saving palettes, etc.
* Bug fix in `polarLAB_to_LAB` conversion.
* All `.Call()` calls now with `PACKAGE = "colorspace"`.
* Added some simple tests based on the examples and vignette.
# colorspace 1.1-1
* Added `desaturate()` function for removal of chroma in a given
vector of colors.
* Bug fix in `HLS_to_RGB` conversion for `s == 0`.
# colorspace 1.1-0
* Added `sRGB` colorspace.
(Existing `RGB` colorspace is linearized "sRGB".)
* Conversions to and from `HSV` and `HSL` can only occur
from or to `RGB` or `sRGB` (because both `HSV` and `HSL`
are relative colorspaces, meaning relative to a particular
RGB colorspace).
(Converting to or from `RGB` gives a different result
compared to conversion to or from `sRGB`.)
* All `gamma` parameters in all R-level functions have been deprecated.
(The `sRGB` colorspace has implicit gamma.)
# colorspace 1.0-1
* "Escaping RGBland" paper is now published _Computational
Statistics & Data Analysis_ as
[doi:10.1016/j.csda.2008.11.033](https://doi.org/10.1016/j.csda.2008.11.033).
Citation and references updated accordingly.
# colorspace 1.0-0
* New version to accompany the "Escaping RGBland" paper accepted
for publication in _Computational Statistics & Data Analysis_, see
`citation("colorspace")`
# colorspace 0.97
* Moved color palettes from vcd to colorspace, including
`vignette("hcl-colors")`
* Added infrastructure for HLS color space
* New CITATION file