numpy.core.records.array(obj, dtype=None, shape=None, offset=0, strides=None, formats=None, names=None, titles=None, aligned=False, byteorder=None

numpy.fromfunction(function, shape, **kwargs)

numpy.empty(shape, dtype=float, order='C') Return a new array of given shape and type, without initializing entries.

numpy.meshgrid(*xi, **kwargs)

numpy.logspace(start, stop, num=50, endpoint=True, base=10.0, dtype=None)