Functional programming
| apply_along_axis(func1d, axis, arr, *args, ...) | Apply a function to 1-D slices along the given axis. | 
| apply_over_axes(func, a, axes) | Apply a function repeatedly over multiple axes. | 
| vectorize(pyfunc[, otypes, doc, excluded, cache]) | Generalized function class. | 
| frompyfunc(func, nin, nout) | Takes an arbitrary Python function and returns a Numpy ufunc. | 
| piecewise(x, condlist, funclist, *args, **kw) | Evaluate a piecewise-defined function. | 
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    https://docs.scipy.org/doc/numpy-1.10.1/reference/routines.functional.html