/** * makeExpRegression * * Factory function to return a regression object set up to perform * regressions against data fitted with the equation * * y = a * b1^x1 * b2^x2 * ... * bn^xn * * @return static */ public static function makeExpRegression(RegressionAlgorithmInterface $regressionStrategy = null) { $regression = Regression::makeExpRegression($regressionStrategy); $simple = new static(); $simple->regression = $regression; return $simple; }