wehub-resource-sync
29 lines
587 B
Python
Executable File
29 lines
587 B
Python
Executable File
from prml.nn.tensor.constant import Constant
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from prml.nn.tensor.tensor import Tensor
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from prml.nn.function import Function
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class Negative(Function):
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"""
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element-wise negative
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y = -x
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"""
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def forward(self, x):
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x = self._convert2tensor(x)
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self.x = x
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if isinstance(self.x, Constant):
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return Constant(-x.value)
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return Tensor(-x.value, function=self)
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def backward(self, delta):
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dx = -delta
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self.x.backward(dx)
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def negative(x):
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"""
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element-wise negative
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"""
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return Negative().forward(x)
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