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See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
- Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
- PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.
Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401]
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| File Size: | 332 lines (8 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
Apriori:: (17 methods):
__construct()
getRules()
apriori()
predictSample()
generateAllRules()
generateRules()
powerSet()
antecedents()
items()
frequent()
candidates()
confidence()
support()
frequency()
contains()
subset()
equals()
| __construct(float $support = 0.0, float $confidence = 0.0) X-Ref |
| Apriori constructor. |
| getRules() X-Ref |
| Get all association rules which are generated for every k-length frequent item set. return: mixed[][] |
| apriori() X-Ref |
| Generates frequent item sets. return: mixed[][][] |
| predictSample(array $sample) X-Ref |
param: mixed[] $sample return: mixed[][] |
| generateAllRules() X-Ref |
| Generate rules for each k-length frequent item set. |
| generateRules(array $frequent) X-Ref |
| Generate confident rules for frequent item set. param: mixed[] $frequent |
| powerSet(array $sample) X-Ref |
| Generates the power set for given item set $sample. param: mixed[] $sample return: mixed[][] |
| antecedents(array $sample) X-Ref |
| Generates all proper subsets for given set $sample without the empty set. param: mixed[] $sample return: mixed[][] |
| items() X-Ref |
| Calculates frequent k = 1 item sets. return: mixed[][] |
| frequent(array $samples) X-Ref |
| Returns frequent item sets only. param: mixed[][] $samples return: mixed[][] |
| candidates(array $samples) X-Ref |
| Calculates frequent k item sets, where count($samples) == $k - 1. param: mixed[][] $samples return: mixed[][] |
| confidence(array $set, array $subset) X-Ref |
| Calculates confidence for $set. Confidence is the relative amount of sets containing $subset which also contain $set. param: mixed[] $set param: mixed[] $subset |
| support(array $sample) X-Ref |
| Calculates support for item set $sample. Support is the relative amount of sets containing $sample in the data pool. param: mixed[] $sample |
| frequency(array $sample) X-Ref |
| Counts occurrences of $sample as subset in data pool. param: mixed[] $sample |
| contains(array $system, array $set) X-Ref |
| Returns true if set is an element of system. param: mixed[][] $system param: mixed[] $set |
| subset(array $set, array $subset) X-Ref |
| Returns true if subset is a (proper) subset of set by its items string representation. param: mixed[] $set param: mixed[] $subset |
| equals(array $set1, array $set2) X-Ref |
| Returns true if string representation of items does not differ. param: mixed[] $set1 param: mixed[] $set2 |
