散点图中的黑点

Question

This is likely an elementary question, but I can't figure out how to plot black points in a scatter plot!

import matplotlib.pyplot as plt
x = range(255)
y = range(255)
color = range(255)
plt.scatter(x, y, c=color)

This does not result in black dots!

Answer 1

Not sure if this is what you want, but why not simply specify the color to be black?

import matplotlib.pyplot as plt
x = range(255)
y = range(255)
# color = range(255)  not needed?
plt.scatter(x, y, c='black')

Edit: To make things a little more clear maybe: You can specify colors in pyplot in different ways:

• use built-in colors accessible via strings (eg color="blue" or c="b" )
• use greyshades via floats in the range of 0-1 (eg color=0.75 )
• use hex-strings (eg color='#eeefff' )
• use rgb-tuples, each in the range of 0-1 (eg color=(0.5, 0.5, 0.5) )