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Developer Documentation
- Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
- Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 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.
/mod/workshop/eval/best/ -> lib.php (source)
Differences Between: [Versions 310 and 402] [Versions 310 and 403]
Contains logic class and interface for the grading evaluation plugin "Comparison with the best assessment".
| Copyright: | 2009 David Mudrak <david.mudrak@gmail.com> |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 443 lines (18 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 1 file mod/workshop/eval/lib.php |
Defines 2 classes
workshop_best_evaluation:: (10 methods):
__construct()
update_grading_grades()
get_settings_form()
delete_instance()
process_assessments()
prepare_data_from_recordset()
normalize_grades()
average_assessment()
weighted_variance()
assessments_distance()
workshop_best_evaluation_settings_form:: (1 method):
definition_sub()
Class: workshop_best_evaluation - X-Ref
Defines the computation login of the grading evaluation subplugin| __construct(workshop $workshop) X-Ref |
| Constructor param: workshop $workshop The workshop api instance return: void |
| update_grading_grades(stdclass $settings, $restrict=null) X-Ref |
| Calculates the grades for assessment and updates 'gradinggrade' fields in 'workshop_assessments' table This function relies on the grading strategy subplugin providing get_assessments_recordset() method. {@see self::process_assessments()} for the required structure of the recordset. param: stdClass $settings The settings for this round of evaluation param: null|int|array $restrict If null, update all reviewers, otherwise update just grades for the given reviewers(s) return: void |
| get_settings_form(moodle_url $actionurl=null) X-Ref |
| Returns an instance of the form to provide evaluation settings. return: workshop_best_evaluation_settings_form |
| delete_instance($workshopid) X-Ref |
| Delete all data related to a given workshop module instance param: int $workshopid id of the workshop module instance being deleted return: void |
| process_assessments(array $assessments, array $diminfo, stdclass $settings) X-Ref |
| Given a list of all assessments of a single submission, updates the grading grades in database param: array $assessments of stdclass (->assessmentid ->assessmentweight ->reviewerid ->gradinggrade ->submissionid ->dimensionid ->grade) param: array $diminfo of stdclass (->id ->weight ->max ->min) param: stdClass grading evaluation settings return: void |
| prepare_data_from_recordset($assessments) X-Ref |
| Prepares a structure of assessments and given grades param: array $assessments batch of recordset items as returned by the grading strategy return: array |
| normalize_grades(array $assessments, array $diminfo) X-Ref |
| Normalizes the dimension grades to the interval 0.00000 - 100.00000 Note: this heavily relies on PHP5 way of handling references in array of stdclasses. Hopefully it will not change again soon. param: array $assessments of stdclass as returned by {@see self::prepare_data_from_recordset()} param: array $diminfo of stdclass return: array of stdclass with the same structure as $assessments |
| average_assessment(array $assessments) X-Ref |
| Given a set of a submission's assessments, returns a hypothetical average assessment The passed structure must be array of assessments objects with ->weight and ->dimgrades properties. Returns null if all passed assessments have zero weight as there is nothing to choose from then. param: array $assessments as prepared by {@link self::prepare_data_from_recordset()} return: null|stdClass |
| weighted_variance(array $assessments) X-Ref |
| Given a set of a submission's assessments, returns standard deviations of all their dimensions The passed structure must be array of assessments objects with at least ->weight and ->dimgrades properties. This implementation uses weighted incremental algorithm as suggested in "D. H. D. West (1979). Communications of the ACM, 22, 9, 532-535: Updating Mean and Variance Estimates: An Improved Method" {@link http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Weighted_incremental_algorithm} param: array $assessments as prepared by {@link self::prepare_data_from_recordset()} return: null|array indexed by dimension id |
| assessments_distance(stdclass $assessment, stdclass $referential, array $diminfo, stdclass $settings) X-Ref |
| Measures the distance of the assessment from a referential one The passed data structures must contain ->dimgrades property. The referential assessment is supposed to be close to the average assessment. All dimension grades are supposed to be normalized to the interval 0 - 100. Returned value is rounded to 4 valid decimals to prevent some rounding issues - see the unit test for an example. param: stdClass $assessment the assessment being measured param: stdClass $referential assessment param: array $diminfo of stdclass(->weight ->min ->max ->variance) indexed by dimension id param: stdClass $settings return: float|null rounded to 4 valid decimals |
Class: workshop_best_evaluation_settings_form - X-Ref
Represents the settings form for this plugin.| definition_sub() X-Ref |
| Defines specific fields for this evaluation method. |
