#!/usr/bin/env python # -*- coding: utf-8 -*- # Copyright 1999-2020 Alibaba Group Holding Ltd. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import numpy as np from ... import opcodes as OperandDef from ...serialize import BoolField from ..array_utils import device, as_same_device from ..utils import infer_dtype from .core import TensorUnaryOp from .utils import arithmetic_operand @arithmetic_operand(init=False, sparse_mode='unary') class TensorAngle(TensorUnaryOp): _op_type_ = OperandDef.ANGLE _func_name = 'angle' _deg = BoolField('deg') @property def deg(self): return self._deg def __init__(self, deg=None, casting='same_kind', err=None, dtype=None, sparse=False, **kw): err = err if err is not None else np.geterr() super().__init__(_deg=deg, _casting=casting, _err=err, _dtype=dtype, _sparse=sparse, **kw) @classmethod def execute(cls, ctx, op): (z,), device_id, xp = as_same_device( [ctx[c.key] for c in op.inputs], device=op.device, ret_extra=True) with device(device_id): ctx[op.outputs[0].key] = xp.angle(z, deg=op.deg) @infer_dtype(np.angle) def angle(z, deg=0, **kwargs): """ Return the angle of the complex argument. Parameters ---------- z : array_like A complex number or sequence of complex numbers. deg : bool, optional Return angle in degrees if True, radians if False (default). Returns ------- angle : Tensor or scalar The counterclockwise angle from the positive real axis on the complex plane, with dtype as numpy.float64. See Also -------- arctan2 absolute Examples -------- >>> import mars.tensor as mt >>> mt.angle([1.0, 1.0j, 1+1j]).execute() # in radians array([ 0. , 1.57079633, 0.78539816]) >>> mt.angle(1+1j, deg=True).execute() # in degrees 45.0 """ op = TensorAngle(deg=deg, **kwargs) return op(z)