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See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
- Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
Differences Between: [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]
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Defines 1 class
RandomForest:: (6 methods):
__construct()
setFeatureSubsetRatio()
setClassifer()
getFeatureImportances()
setColumnNames()
initSingleClassifier()
Class: RandomForest - X-Ref
| __construct(int $numClassifier = 50) X-Ref |
| Initializes RandomForest with the given number of trees. More trees may increase the prediction performance while it will also substantially increase the processing time and the required memory |
| setFeatureSubsetRatio($ratio) X-Ref |
| This method is used to determine how many of the original columns (features) will be used to construct subsets to train base classifiers.<br> Allowed values: 'sqrt', 'log' or any float number between 0.1 and 1.0 <br> Default value for the ratio is 'log' which results in log(numFeatures, 2) + 1 features to be taken into consideration while selecting subspace of features param: string|float $ratio |
| setClassifer(string $classifier, array $classifierOptions = []) X-Ref |
| RandomForest algorithm is usable *only* with DecisionTree return: $this |
| getFeatureImportances() X-Ref |
| This will return an array including an importance value for each column in the given dataset. Importance values for a column is the average importance of that column in all trees in the forest |
| setColumnNames(array $names) X-Ref |
| A string array to represent the columns is given. They are useful when trying to print some information about the trees such as feature importances return: $this |
| initSingleClassifier(Classifier $classifier) X-Ref |
param: DecisionTree $classifier return: DecisionTree |
