Python source code: plot_pie.py
import numpy as np
n = 20
X = np.ones(n)
X[-1] *= 2
pl.pie(X, explode=X*.05, colors = ['%f' % (i/float(n)) for i in range(n)])
fig = pl.gcf()
w, h = fig.get_figwidth(), fig.get_figheight()
r = h / float(w)
pl.xlim(-1.5, 1.5)
pl.ylim(-1.5 * r, 1.5 * r)
pl.xticks(())
pl.yticks(())
pl.text(-0.05, 1.02, " Pie Chart: pl.pie(...)\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 pie chart of an array ",
horizontalalignment='left',
verticalalignment='top',
size='large',
transform=pl.gca().transAxes)
pl.show()