| 1 | /**
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| 2 | * @license
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| 3 | * Copyright 2020 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 { Pack } from '../kernel_names';
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| 19 | import { convertToTensorArray } from '../tensor_util_env';
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| 20 | import * as util from '../util';
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| 21 | import { op } from './operation';
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| 22 | /**
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| 23 | * Stacks a list of rank-`R` `tf.Tensor`s into one rank-`(R+1)` `tf.Tensor`.
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| 24 | *
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| 25 | * ```js
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| 26 | * const a = tf.tensor1d([1, 2]);
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| 27 | * const b = tf.tensor1d([3, 4]);
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| 28 | * const c = tf.tensor1d([5, 6]);
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| 29 | * tf.stack([a, b, c]).print();
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| 30 | * ```
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| 31 | *
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| 32 | * @param tensors A list of tensor objects with the same shape and dtype.
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| 33 | * @param axis The axis to stack along. Defaults to 0 (the first dim).
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| 34 | *
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| 35 | * @doc {heading: 'Tensors', subheading: 'Slicing and Joining'}
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| 36 | */
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| 37 | function stack_(tensors, axis = 0) {
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| 38 | const $tensors = convertToTensorArray(tensors, 'tensors', 'stack', 'string_or_numeric');
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| 39 | util.assert($tensors.length >= 1, () => 'Pass at least one tensor to tf.stack');
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| 40 | if ($tensors.length > 0) {
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| 41 | util.assert(axis <= $tensors[0].rank, () => 'Axis must be <= rank of the tensor');
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| 42 | }
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| 43 | const inputs = $tensors;
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| 44 | const attrs = { axis };
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| 45 | return ENGINE.runKernel(Pack, inputs, attrs);
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| 46 | }
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| 47 | export const stack = op({ stack_ });
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| 48 | //# sourceMappingURL=stack.js.map |
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