| public calculate ( ) |
public function calculate()
{
// Linearize the relationship by taking the log of both sides.
$x’ = array_map('log', $this->xs);
$y’ = array_map('log', $this->ys);
// Perform Least Squares Fit
$linearized_parameters = $this->leastSquares($y’, $x’)->getColumn(0);
// Translate the linearized parameters back.
$this->a = exp($linearized_parameters[0]);
$this->b = $linearized_parameters[1];
$this->parameters = [$this->a, $this->b];
}