The fill() command itself does work if you give it

> coordinates for a closed polygon. This draws a filled

> spiral:

Of course (slaps self on forehead). So my example rewritten would be

rewritten using the cleaner

from matplotlib.matlab import *

x1 = arange(0, 2, 0.01)

y1 = sin(2*pi*x1)

y2 = sin(4*pi*x1) + 2

# reverse x and y2 so the polygon fills in order

x = concatenate( (x1,x1[::-1]) )

y = concatenate( (y1,y2[::-1]) )

p = fill(x, y, facecolor='g')

set(p, alpha=0.5)

show()

I took the liberty of adding your example to CVS in the examples

subdir as examples/fill_spiral.py.

Thanks!

JDH