Plot empty markers in y vs x plot with colors according to z values

Question

I want to plot empty the circles in y vs x plot and I found a nice answer here I wanted to ask if I can set an edge color according to these values of a third array. I modified this code as follows, but as required, I can only pass color and values to the edge color:

import matplotlib.pyplot as plt 

import numpy as np 

x = np.random.randn(60) 

y = np.random.randn(60)

z = np.random.randn(60)

plt.scatter(x, y, s=80, facecolors='none', edgecolors=z)

Answer 1

Here are the 2 ideas:

# define some condition for colors:

colors = ['red' if a < 0 else 'blue' for a in z ]

plt.scatter(x, y, s=80, facecolors='none', edgecolors=colors)

# get colors directly from colormap

plt.scatter(x, y, s=80, facecolors='none', edgecolors=plt.cm.viridis(z))

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