matplotlib handling colors

colormap

Matplotlib: colormap transformations — SciPy Cookbook documentation

Operating on color vectors, Operating on indices, Discrete colormap

Matplotlib: loading a colormap dynamically — SciPy Cookbook documentation

Matplotlib: show colormaps — SciPy Cookbook documentation

also "colormap has a break halfway through"

discrete colormap

code:python

import matplotlib as mpl

white center

code:python

from matplotlib.colors import ListedColormap

newcolors=[]

cmap=plt.cm.get_cmap('jet', 11)

for n in range(11):

if n==5:

else:

newcolors.append(cmap(n))

newcmap= ListedColormap(newcolors)

code:python

import matplotlib.colors as mcolors

matplotlibのcolormapのRGB情報取得と関連操作 - Qiita

Specify color beyond limits

code:python

# no value

new_cmap=cmap.set_bad(color='black', alpha=None)

# larger than limit

new_cmap=cmap.set_over(color='black', alpha=None)

# lower than limit

new_cmap=cmap.set_under(color='black', alpha=None)¶

makeing colormap from 2 RGB values

code:python

# function

def two_color(low,high,name):

import matplotlib as mpl

LinL=np.hstack((low,high))

LinL=LinL/255.

s=len(LinL)

LinL=LinL.reshape((s/3,3))

N,n3=LinL.shape

rgb=np.zeros((3,N,3))

for n in range(3):

data=dict(zip(k,rgb)) # makes a dictionary from 2 lists

my_cmap = mpl.colors.LinearSegmentedColormap(name,data)

return my_cmap

# caling function

pylab_examples example code: custom_cmap.py

Creating a colormap from a list of colors, valying alpha, Discrete

python - Transparent colormap - Stack Overflow

matplotlib.colors.LinearSegmentedColormap.from_list("name",list,N=)

MetPy Mondays `#158 - Custom Legends and Colormapped Lines : Unidata Developer's Blog

MetPy Mondays `#177​​​ - Changing Figure Colors on a Skew-T : Unidata Developer's Blog

code:python

ax.set_facecolor("black")

fig.patch.set_facecolor("bisque")

2D colormaps

Pythology Blog: Designing 2D colormaps and using them with matplotlib

python - 2d hsv color space in matplotlib - Stack Overflow

A color

check available color

code:python

print(matplotlib.colors.cnames)

Examples

Changing color of bars depending on El Nino or La Nina

Colormap Examples (PyHOGS)

Colormap example for bathymetry (PyHOGS)

See also