It looks like you're using Numeric for your arrays, but you are then pulling sin from the math module and calculating one point at a time. Instead try using sin(whole array) where sin is a ufunc from the Numeric module. Also, it's usually not good practice to "import Numeric as *". Instead try import Numeric as N so it's clear which functions you are using.
-- David -- http://mail.python.org/mailman/listinfo/python-list
