numpy.meshgrid(*xi, **kwargs)

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

numpy.ones(shape, dtype=None, order='C')

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

numpy.core.records.fromarrays(arrayList, dtype=None, shape=None, formats=None, names=None, titles=None, aligned=False, byteorder=None)