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pyplot scatter plot marker size

In the pyplot document for scatter plot:

matplotlib.pyplot.scatter(x, y, s=20, c='b', marker='o', cmap=None, norm=None,
                              vmin=None, vmax=None, alpha=None, linewidths=None,
                              faceted=True, verts=None, hold=None, **kwargs)

The marker size

s: size in points^2. It is a scalar or an array of the same length as x and y.

What kind of unit is points^2? What does it mean? Does s=100 mean 10 pixel x 10 pixel?

Basically I'm trying to make scatter plots with different marker sizes, and I want to figure out what does the s number mean.

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1

Should be i in output shouldn't?
– Sigur
Commented May 5, 2017 at 1:36
Agree with @Sigur
– user3212761
Commented May 10, 2021 at 14:30

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pyplot scatter plot marker size

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