i want to transfer a pine-script linreg function to php, and i need some help which values are exactly passed to the linreg function.
i.e. my linreg function in pine-script looks like this:
linreg(close, 20, 0)
for calculating the linear regression in php, i have the following function:
public static function linear_regression($x, $y) {
// calculate number points
$n = count($x);
// ensure both arrays of points are the same size
if ($n != count($y)) {
trigger_error("linear_regression(): Number of elements in coordinate arrays do not match.", E_USER_ERROR);
}
// calculate sums
$x_sum = array_sum($x);
$y_sum = array_sum($y);
$xx_sum = 0;
$xy_sum = 0;
for($i = 0; $i < $n; $i++) {
$xy_sum+=($x[$i]*$y[$i]);
$xx_sum+=($x[$i]*$x[$i]);
}
// calculate slope
$m = (($n * $xy_sum) - ($x_sum * $y_sum)) / (($n * $xx_sum) - ($x_sum * $x_sum));
// calculate intercept
$b = ($y_sum - ($m * $x_sum)) / $n;
// return result
return array("m"=>$m, "b"=>$b);
}
my question now is what data i have to pass to my php function to get the same result as in the pine-script.
question from:
https://stackoverflow.com/questions/65541564/how-does-the-pine-script-linreg-function-work 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…