Python source code: plot_scatter.py
import numpy as np
n = 1024
X = np.random.normal(0, 1, n)
Y = np.random.normal(0, 1, n)
T = np.arctan2(Y,X)
pl.scatter(X, Y, s=75, c=T, alpha=.5)
pl.xlim(-1.5, 1.5)
pl.xticks(())
pl.ylim(-1.5, 1.5)
pl.yticks(())
pl.text(-0.05, 1.02, " Scatter Plot: pl.scatter(...)\n",
horizontalalignment='left',
verticalalignment='top',
size='xx-large',
bbox=dict(facecolor='white', alpha=1.0, width=400, height=65),
transform=pl.gca().transAxes)
pl.text(-0.05, 1.01, "\n\n Make a scatter plot of x versus y ",
horizontalalignment='left',
verticalalignment='top',
size='large',
transform=pl.gca().transAxes)
pl.show()