| public calculate ( ) |
public function calculate()
{
// The slopes array will be a list of slopes between all pairs of points
$slopes = [];
$n = count($this->points);
for ($i = 0; $i < $n; $i++) {
for ($j = $i + 1; $j < $n; $j++) {
$pointi = $this->points[$i];
$pointj = $this->points[$j];
$slopes[] = ($pointj[1] - $pointi[1]) / ($pointj[0] - $pointi[0]);
}
}
$this->m = Average::median($slopes);
$this->b = Average::median($this->ys) - $this->m * Average::median($this->xs);
$this->parameters = [$this->b, $this->m];
}