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<?php |
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|
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/** |
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* |
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* Function code for the matrix diagonal() function |
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* |
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* @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix) |
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* @license https://opensource.org/licenses/MIT MIT |
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*/ |
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|
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namespace Matrix; |
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|
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/** |
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* Returns the diagonal of a matrix or an array. |
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* |
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* @param Matrix|array $matrix Matrix or an array to treat as a matrix. |
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* @return Matrix The new matrix |
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* @throws Exception If argument isn't a valid matrix or array. |
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*/ |
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function diagonal($matrix) |
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{ |
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if (is_array($matrix)) { |
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$matrix = new Matrix($matrix); |
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} |
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if (!$matrix instanceof Matrix) { |
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throw new Exception('Must be Matrix or array'); |
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} |
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|
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return Functions::diagonal($matrix); |
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} |
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|
