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34 lines
1.3 KiB
34 lines
1.3 KiB
# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import paddle
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from paddle import nn
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class ZScore(nn.Layer):
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# feature last
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def __init__(self, mu, sigma):
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super().__init__()
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self.register_buffer("mu", mu)
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self.register_buffer("sigma", sigma)
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def forward(self, x):
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# NOTE: to be compatible with paddle's to_static, we must explicitly
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# call multiply, or add, etc, instead of +-*/, etc.
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return paddle.divide(paddle.subtract(x, self.mu), self.sigma)
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def inverse(self, x):
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# NOTE: to be compatible with paddle's to_static, we must explicitly
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# call multiply, or add, etc, instead of +-*/, etc.
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return paddle.add(paddle.multiply(x, self.sigma), self.mu)
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