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DOC: Better doc of colors#22912

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timhoffm merged 5 commits intomatplotlib:mainfromlarsoner:colors
Apr 28, 2022
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55 changes: 36 additions & 19 deletionsexamples/color/named_colors.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -3,29 +3,31 @@
List of named colors
====================

This plots a list of the named colors supported in matplotlib. Note that
:ref:`xkcd colors <xkcd-colors>` are supported as well, but are not listed here
for brevity.

This plots a list of the named colors supported in matplotlib.
For more information on colors in matplotlib see

* the :doc:`/tutorials/colors/colors` tutorial;
* the `matplotlib.colors` API;
* the :doc:`/gallery/color/color_demo`.

----------------------------
Helper Function for Plotting
----------------------------
First we define a helper function for making a table of colors, then we use it
on some common color categories.
"""

from matplotlib.patches import Rectangle
import matplotlib.pyplot as plt
import matplotlib.colors as mcolors


def plot_colortable(colors,title,sort_colors=True, emptycols=0):
def plot_colortable(colors, sort_colors=True, emptycols=0):

cell_width = 212
cell_height = 22
swatch_width = 48
margin = 12
topmargin = 40

# Sort colors by hue, saturation, value and name.
if sort_colors is True:
Expand All@@ -41,18 +43,17 @@ def plot_colortable(colors, title, sort_colors=True, emptycols=0):
nrows = n // ncols + int(n % ncols > 0)

width = cell_width * 4 + 2 * margin
height = cell_height * nrows +margin + topmargin
height = cell_height * nrows +2 * margin
dpi = 72

fig, ax = plt.subplots(figsize=(width / dpi, height / dpi), dpi=dpi)
fig.subplots_adjust(margin/width, margin/height,
(width-margin)/width, (height-topmargin)/height)
(width-margin)/width, (height-margin)/height)
ax.set_xlim(0, cell_width * 4)
ax.set_ylim(cell_height * (nrows-0.5), -cell_height/2.)
ax.yaxis.set_visible(False)
ax.xaxis.set_visible(False)
ax.set_axis_off()
ax.set_title(title, fontsize=24, loc="left", pad=10)

for i, name in enumerate(names):
row = i % nrows
Expand All@@ -73,22 +74,38 @@ def plot_colortable(colors, title, sort_colors=True, emptycols=0):

return fig

plot_colortable(mcolors.BASE_COLORS, "Base Colors",
sort_colors=False, emptycols=1)
plot_colortable(mcolors.TABLEAU_COLORS, "Tableau Palette",
sort_colors=False, emptycols=2)
#############################################################################
# -----------
# Base colors
# -----------

# sphinx_gallery_thumbnail_number = 3
plot_colortable(mcolors.CSS4_COLORS, "CSS Colors")
plot_colortable(mcolors.BASE_COLORS, sort_colors=False, emptycols=1)

# Optionally plot the XKCD colors (Caution: will produce large figure)
# xkcd_fig = plot_colortable(mcolors.XKCD_COLORS, "XKCD Colors")
# xkcd_fig.savefig("XKCD_Colors.png")
#############################################################################
# ---------------
# Tableau Palette
# ---------------

plt.show()
plot_colortable(mcolors.TABLEAU_COLORS, sort_colors=False, emptycols=2)

#############################################################################
# ----------
# CSS Colors
# ----------

# sphinx_gallery_thumbnail_number = 3
plot_colortable(mcolors.CSS4_COLORS)
plt.show()

#############################################################################
# -----------
# XKCD Colors
# -----------
# XKCD colors are supported, but they produce a large figure, so we skip them
# for now. You can use the following code if desired::
#
# xkcd_fig = plot_colortable(mcolors.XKCD_COLORS, "XKCD Colors")
# xkcd_fig.savefig("XKCD_Colors.png")
#
# .. admonition:: References
#
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