Creating step function

[Gribouillis]

Occasional numpy user here, the following example may help

>>> import numpy as np
>>> t = np.linspace(0, 12, 30)
>>> t
array([ 0.        ,  0.4137931 ,  0.82758621,  1.24137931,  1.65517241,
        2.06896552,  2.48275862,  2.89655172,  3.31034483,  3.72413793,
        4.13793103,  4.55172414,  4.96551724,  5.37931034,  5.79310345,
        6.20689655,  6.62068966,  7.03448276,  7.44827586,  7.86206897,
        8.27586207,  8.68965517,  9.10344828,  9.51724138,  9.93103448,
       10.34482759, 10.75862069, 11.17241379, 11.5862069 , 12.        ])
>>> np.where(np.logical_and(0 < t, t < 1), 150.0, 0.0) + np.where(np.logical_and(10.0 < t, t < 11.0), 50.0, 0.0)
array([  0., 150., 150.,   0.,   0.,   0.,   0.,   0.,   0.,   0.,   0.,
         0.,   0.,   0.,   0.,   0.,   0.,   0.,   0.,   0.,   0.,   0.,
         0.,   0.,   0.,  50.,  50.,   0.,   0.,   0.])