example code does not produce bimodal distributions

[mlandis]

Hi, the + operator for numpy arrays adds instead of concatenates. You might update the example to use numpy.append instead.

> import numpy as np
> np.append( np.random.randn(5), np.random.randn(5)+5 )
array([ -1.26092769e+00,  -4.59275823e-02,   7.20287436e-02,
        -5.72663805e-03,  -6.32962772e-01,   5.39421136e+00,
         6.39230189e+00,   4.80849479e+00,   4.35711805e+00,
         6.44318687e+00])
> np.random.randn(5) + np.random.randn(5)+5
array([ 6.010514  ,  4.60251521,  4.21025537,  5.74266869,  4.93374465])