Source code for mars.tensor.arithmetic.signbit

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 1999-2021 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
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
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import numpy as np

from ... import opcodes as OperandDef
from ..utils import inject_dtype
from .core import TensorUnaryOp
from .utils import arithmetic_operand

class TensorSignbit(TensorUnaryOp):
    _op_type_ = OperandDef.SIGNBIT
    _func_name = "signbit"

[docs]@inject_dtype(np.bool_) def signbit(x, out=None, where=None, **kwargs): """ Returns element-wise True where signbit is set (less than zero). Parameters ---------- x : array_like The input value(s). out : Tensor, None, or tuple of Tensor and None, optional A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or `None`, a freshly-allocated tensor is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs. where : array_like, optional Values of True indicate to calculate the ufunc at that position, values of False indicate to leave the value in the output alone. **kwargs Returns ------- result : Tensor of bool Output tensor, or reference to `out` if that was supplied. Examples -------- >>> import mars.tensor as mt >>> mt.signbit(-1.2).execute() True >>> mt.signbit(mt.array([1, -2.3, 2.1])).execute() array([False, True, False]) """ op = TensorSignbit(**kwargs) return op(x, out=out, where=where)