Source code for mars.tensor.arithmetic.trunc

#!/usr/bin/env python
# -*- coding: utf-8 -*-
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#      http://www.apache.org/licenses/LICENSE-2.0
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import numpy as np

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


@arithmetic_operand(sparse_mode='unary')
class TensorTrunc(TensorUnaryOp):
    _op_type_ = OperandDef.TRUNC
    _func_name = 'trunc'


[docs]@infer_dtype(np.trunc) def trunc(x, out=None, where=None, **kwargs): """ Return the truncated value of the input, element-wise. The truncated value of the scalar `x` is the nearest integer `i` which is closer to zero than `x` is. In short, the fractional part of the signed number `x` is discarded. Parameters ---------- x : array_like Input data. 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 ------- y : Tensor or scalar The truncated value of each element in `x`. See Also -------- ceil, floor, rint Examples -------- >>> import mars.tensor as mt >>> a = mt.array([-1.7, -1.5, -0.2, 0.2, 1.5, 1.7, 2.0]) >>> mt.trunc(a).execute() array([-1., -1., -0., 0., 1., 1., 2.]) """ op = TensorTrunc(**kwargs) return op(x, out=out, where=where)