Hi there, I have a little problem here with array indexing, hope you see the problem. I use the following loop to calculate some integrals
import numpy as N from scipy.integrate import quad T = 1 dt = 0.005 L = 3 n = 2 ints = N.zeros([T/dt]) for t in N.arange(0, T, dt): a = quad(lambda x:-1*(1-4*(t**4))*N.exp(-t**4)*N.exp(-x**2)*N.cos(n*N.pi*(x-L)/(2*L)), -L, L)[0] ints[int(t/dt)] = a print t, N.int32(t/dt), t/dt, a, ints[int(t/dt)] The output from the print statement looks like: 0.14 28 28.0 2.52124867251e-16 2.52124867251e-16 0.145 28 29.0 2.03015199575e-16 2.03015199575e-16 0.15 30 30.0 2.40857836418e-16 2.40857836418e-16 0.155 31 31.0 2.52191011339e-16 2.52191011339e-16 The same happens on the ipython prompt: 0.145 * 0.005 = 28.999999999999996 N.int32(0.145 * 0.005) = 28 Any ideas how to deal with this? Cheers, Ralph _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion