pylab_examples example code: axis_equal_demo.py

(Source code, png)

'''This example is only interesting when ran in interactive mode'''

from pylab import *

# Plot circle or radius 3

an = linspace(0, 2*pi, 100)

subplot(221)
plot(3*cos(an), 3*sin(an))
title('not equal, looks like ellipse', fontsize=10)

subplot(222)
plot(3*cos(an), 3*sin(an))
axis('equal')
title('equal, looks like circle', fontsize=10)

subplot(223)
plot(3*cos(an), 3*sin(an))
axis('equal')
axis([-3, 3, -3, 3])
title('looks like circle, even after changing limits', fontsize=10)

subplot(224)
plot(3*cos(an), 3*sin(an))
axis('equal')
axis([-3, 3, -3, 3])
plot([0, 4], [0, 4])
title('still equal after adding line', fontsize=10)

show()

Keywords: python, matplotlib, pylab, example, codex (see Search examples)