| 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 { GatherV2 } 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 | * Gather slices from tensor `x`'s axis `axis` according to `indices`.
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| 23 | *
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| 24 | * ```js
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| 25 | * const x = tf.tensor1d([1, 2, 3, 4]);
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| 26 | * const indices = tf.tensor1d([1, 3, 3], 'int32');
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| 27 | *
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| 28 | * x.gather(indices).print();
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| 29 | * ```
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| 30 | *
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| 31 | * ```js
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| 32 | * const x = tf.tensor2d([1, 2, 3, 4], [2, 2]);
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| 33 | * const indices = tf.tensor1d([1, 1, 0], 'int32');
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| 34 | *
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| 35 | * x.gather(indices).print();
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| 36 | * ```
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| 37 | * @param x The input tensor whose slices to be gathered.
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| 38 | * @param indices The indices of the values to extract.
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| 39 | * @param axis The axis over which to select values. Defaults to 0.
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| 40 | * @param batchDims Optional. The number of batch dimensions. It must be less
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| 41 | * than or equal to rank(indices). Defaults to 0.
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| 42 | * The output tensor will have shape of
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| 43 | * `x.shape[:axis] + indices.shape[batchDims:] + x.shape[axis + 1:]`
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| 44 | *
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| 45 | * @doc {heading: 'Tensors', subheading: 'Slicing and Joining'}
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| 46 | */
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| 47 | function gather_(x, indices, axis = 0, batchDims = 0) {
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| 48 | const $x = convertToTensor(x, 'x', 'gather');
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| 49 | const $indices = convertToTensor(indices, 'indices', 'gather', 'int32');
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| 50 | const inputs = { x: $x, indices: $indices };
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| 51 | const attrs = { axis, batchDims };
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| 52 | return ENGINE.runKernel(GatherV2, inputs, attrs);
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| 53 | }
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| 54 | export const gather = op({ gather_ });
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| 55 | //# sourceMappingURL=data:application/json;base64,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 |
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