/**
* Gets strings describing the available aggregation methods.
*
* @return array
*/
public static function get_aggregation_strings()
{
if (self::$aggregationstrings === null) {
self::$aggregationstrings = array(GRADE_AGGREGATE_MEAN => get_string('aggregatemean', 'grades'), GRADE_AGGREGATE_WEIGHTED_MEAN => get_string('aggregateweightedmean', 'grades'), GRADE_AGGREGATE_WEIGHTED_MEAN2 => get_string('aggregateweightedmean2', 'grades'), GRADE_AGGREGATE_EXTRACREDIT_MEAN => get_string('aggregateextracreditmean', 'grades'), GRADE_AGGREGATE_MEDIAN => get_string('aggregatemedian', 'grades'), GRADE_AGGREGATE_MIN => get_string('aggregatemin', 'grades'), GRADE_AGGREGATE_MAX => get_string('aggregatemax', 'grades'), GRADE_AGGREGATE_MODE => get_string('aggregatemode', 'grades'), GRADE_AGGREGATE_SUM => get_string('aggregatesum', 'grades'));
}
return self::$aggregationstrings;
}
