I messed up the equation last time I asked this - Can someone please solve this function for X?
$Y = \displaystyle 0.5\:a\:\text{erf}\left(\frac{x-b}{c\sqrt{2}}+.5\right)+d$
When I solve for Y with x=1
and
a = 1.412 b = 1.259 c = 1.003 d = 0.3016
I get 0.5460
I want to plug 0.5460
into a formula and get 1
back.
I am aware that there exists a function called "inverse error function" (erfinv
) where erfinv(erf(x)) = x
but I still can't figure this one out.