Top "Colormap" questions

A colormap (sometimes referred to as a "color table" or "palette") represents a transformation that maps pixel intensity values to colors.

Set Colorbar Range in matplotlib

I have the following code: import matplotlib.pyplot as plt cdict = { 'red' : ( (0.0, 0.25, .25), (0.02, .59, .59), (1., 1., 1.)), 'green': ( (0.0, 0.0, 0.0), (0.02, .45, .45), (1., .97, .97)), 'blue' : ( (0.0, 1.0, 1.0), (0.02, .75, .75), (1., 0.45, 0.45)) } cm = m.colors.LinearSegmentedColormap('my_colormap', …

python matplotlib graph colorbar colormap
Matplotlib : What is the function of cmap in imshow?

I'm trying to learn opencv using python and came across this code below: import cv2 import numpy as np from …

python opencv matplotlib imshow colormap
Matplotlib Plot Lines with Colors Through Colormap

I am plotting multiple lines on a single plot and I want them to run through the spectrum of a …

python numpy matplotlib colormap
What is the default MATLAB Color Order?

I have a plot with two histograms. However, it is difficult to tell which histogram on the plot is coming …

matlab plot colors default colormap
Python: Invalid RGBA argument 0.0 color points according to class

Context I have some points points = np.random.uniform(0,10, size = (10,2)) # array([[ 7.35906037, 6.50049804], [ 3.21883403, 3.81452312], [ 3.52107154, 1.68233797], [ 1.47699577, 6.01692348], [ 3.76051589, 0.25213394], [ 8.93701081, 5.20377479], [ 6.5347188 , 2.12940006], [ 3.62550069, 5.80619507], [ 1.33393325, 5.0088937 ], [ 6.99034593, 7.40277623]]) and they are "classified" or labelled. This means that …

python matplotlib plot colors colormap
How to use viridis in matplotlib 1.4

I want to use the colormap "viridis" (http://bids.github.io/colormap/), and I won't be updating to the development …

python matplotlib colormap
Extract matplotlib colormap in hex-format

I am trying to extract discrete colors from a matplotlib colormap by manipulating this example. However, I cannot find the …

python matplotlib hex color-mapping colormap
How to fix cm.spectral (module 'matplotlib.cm' has no attribute 'spectral')?

I tried running the code from the website https://plot.ly/scikit-learn/plot-kmeans-silhouette-analysis/. when i run it turns out the …

python matplotlib colormap
How can I get the matplotlib rgb color, given the colormap name, BoundryNorm, and 'c='?

How can I get the matplotlib rgb value for a number, NUM, given: A colormap ('autumn_r' which is yellow-to-red …

python matplotlib rgb colormap
Creating a color map / heatmap in Matlab / Octave

I'm using Octave 3.8.1 which is like Matlab and I'm trying to create a color map / heatmap to look something like …

matlab octave heatmap color-mapping colormap