recarray.prod(axis=None, dtype=None, out=None, keepdims=False) Return the product of the array elements over the given axis

numpy.polynomial.polynomial.polyvander2d(x, y, deg)

recarray.nonzero() Return the indices of the elements that are non-zero. Refer to

numpy.restoredot()

numpy.polynomial.laguerre.lagint(c, m=1, k=[], lbnd=0, scl=1, axis=0)

numpy.ma.choose(indices, choices, out=None, mode='raise')

class numpy.vectorize(pyfunc, otypes='', doc=None, excluded=None, cache=False)

chararray.swapcase()

numpy.vdot(a, b) Return the dot product of two vectors. The vdot(a, b) function handles complex

ndarray.round(decimals=0, out=None) Return a with each element rounded to the given number of decimals.