/**
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* @license
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* Copyright 2018 Google Inc. All Rights Reserved.
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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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* =============================================================================
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*/
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import { Tensor1D, Tensor2D } from '../tensor';
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import { TensorLike } from '../types';
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/**
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* Computes the confusion matrix from true labels and predicted labels.
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*
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* ```js
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* const labels = tf.tensor1d([0, 1, 2, 1, 0], 'int32');
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* const predictions = tf.tensor1d([0, 2, 2, 1, 0], 'int32');
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* const numClasses = 3;
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* const out = tf.math.confusionMatrix(labels, predictions, numClasses);
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* out.print();
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* // Expected output matrix:
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* // [[2, 0, 0],
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* // [0, 1, 1],
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* // [0, 0, 1]]
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* ```
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*
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* @param labels The target labels, assumed to be 0-based integers
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* for the classes. The shape is `[numExamples]`, where
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* `numExamples` is the number of examples included.
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* @param predictions The predicted classes, assumed to be
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* 0-based integers for the classes. Must have the same shape as `labels`.
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* @param numClasses Number of all classes, as an integer.
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* Its value must be larger than the largest element in `labels` and
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* `predictions`.
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* @returns The confusion matrix as a int32-type 2D tensor. The value at
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* row `r` and column `c` is the number of times examples of actual class
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* `r` were predicted as class `c`.
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*/
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/** @doc {heading: 'Operations', subheading: 'Evaluation'} */
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export declare function confusionMatrix_(labels: Tensor1D | TensorLike, predictions: Tensor1D | TensorLike, numClasses: number): Tensor2D;
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export declare const confusionMatrix: typeof confusionMatrix_;
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