Pyplot: Cmap(index) -> color function

Question

Suppose I have the following:

data_mats = [ ... ]

# pseudo code
cmap = plt.(...).get_cmap('magma', low=0, high=len(data_mats))

for i in range(0,len(data_mats)):

    # pseudo code
    color = cmap(i)

    mat = data_mats[i]
    plt.plot(mat[:,1],mat[:,2], color=color)

How do I fill in the lines of pseudo code:

# lines of pseudo code
cmap = plt.(...).get_cmap('magma', low=0, high=len(data_mats))

color = cmap(i)

Using pyplot?

(why all the dense examples on matplotlib's website, rather than some code specs?)

Chris · Accepted Answer · 2018-07-06 15:07:05Z

1

import matplotlib.pyplot as plt

i = 10
file_ct = 100

cmap = plt.cm.magma
color = cmap(float(i+1) / float(file_ct))

answered Jul 6, 2018 at 15:07

Chris

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2 Comments

zero298 Over a year ago

Is this additional information for your question? Is this what solved your question? What is this? At least add enough text to tell what this is.

Chris Over a year ago

@zero298 all of the above. The documentation was complex, but the solution was trivial

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