1 | /**
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2 | * @license
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3 | * Copyright 2018 Google LLC. All Rights Reserved.
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | * =============================================================================
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16 | */
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17 | import { ENGINE } from '../engine';
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18 | import { Log } from '../kernel_names';
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19 | import { convertToTensor } from '../tensor_util_env';
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20 | import { op } from './operation';
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21 | /**
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22 | * Computes natural logarithm of the input `tf.Tensor` element-wise: `ln(x)`
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23 | *
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24 | * ```js
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25 | * const x = tf.tensor1d([1, 2, Math.E]);
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26 | *
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27 | * x.log().print(); // or tf.log(x)
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28 | * ```
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29 | * @param x The input tensor.
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30 | *
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31 | * @doc {heading: 'Operations', subheading: 'Basic math'}
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32 | */
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33 | function log_(x) {
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34 | const $x = convertToTensor(x, 'x', 'log', 'float32');
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35 | const inputs = { x: $x };
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36 | return ENGINE.runKernel(Log, inputs);
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37 | }
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38 | export const log = op({ log_ });
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