php-ai /
php-ml
| @@ 36-54 (lines=19) @@ | ||
| 33 | * |
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| 34 | * @throws \Exception |
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| 35 | */ |
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| 36 | public function __construct($totalVariance = null, $numFeatures = null) |
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| 37 | { |
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| 38 | if ($totalVariance !== null && ($totalVariance < 0.1 || $totalVariance > 0.99)) { |
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| 39 | throw new \Exception("Total variance can be a value between 0.1 and 0.99"); |
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| 40 | } |
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| 41 | if ($numFeatures !== null && $numFeatures <= 0) { |
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| 42 | throw new \Exception("Number of features to be preserved should be greater than 0"); |
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| 43 | } |
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| 44 | if ($totalVariance !== null && $numFeatures !== null) { |
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| 45 | throw new \Exception("Either totalVariance or numFeatures should be specified in order to run the algorithm"); |
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| 46 | } |
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| 47 | ||
| 48 | if ($numFeatures !== null) { |
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| 49 | $this->numFeatures = $numFeatures; |
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| 50 | } |
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| 51 | if ($totalVariance !== null) { |
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| 52 | $this->totalVariance = $totalVariance; |
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| 53 | } |
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| 54 | } |
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| 55 | ||
| 56 | /** |
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| 57 | * Takes a data and returns a lower dimensional version |
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| @@ 51-69 (lines=19) @@ | ||
| 48 | * |
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| 49 | * @throws \Exception |
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| 50 | */ |
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| 51 | public function __construct($totalVariance = null, $numFeatures = null) |
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| 52 | { |
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| 53 | if ($totalVariance !== null && ($totalVariance < 0.1 || $totalVariance > 0.99)) { |
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| 54 | throw new \Exception("Total variance can be a value between 0.1 and 0.99"); |
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| 55 | } |
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| 56 | if ($numFeatures !== null && $numFeatures <= 0) { |
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| 57 | throw new \Exception("Number of features to be preserved should be greater than 0"); |
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| 58 | } |
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| 59 | if ($totalVariance !== null && $numFeatures !== null) { |
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| 60 | throw new \Exception("Either totalVariance or numFeatures should be specified in order to run the algorithm"); |
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| 61 | } |
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| 62 | ||
| 63 | if ($numFeatures !== null) { |
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| 64 | $this->numFeatures = $numFeatures; |
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| 65 | } |
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| 66 | if ($totalVariance !== null) { |
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| 67 | $this->totalVariance = $totalVariance; |
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| 68 | } |
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| 69 | } |
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| 70 | ||
| 71 | /** |
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| 72 | * Trains the algorithm to transform the given data to a lower dimensional space. |
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