mini\Util\Math\Decimal::ln() Method

Signature

public function ln(?int $scale = NULL): self

Parameters

Returns

self

Documentation

Natural logarithm using Newton-Raphson on exp

Solves exp(y) = x for y using iteration: y_{n+1} = y_n + (x - exp(y_n)) / exp(y_n) = y_n - 1 + x / exp(y_n)

Source

src/Util/Math/Decimal.php:360-419