MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Mathematica 5.1 Cumulative Normal Definition


Frank M wrote:
> (normalcdf[x_] := 1/2 Erf[x^2] + 1/2;
> [...]

Are you sure you copied that right? If x is standard normal
(mean = 0, variance = 1) then its cdf is 1/2 Erf[x/Sqrt[2]] + 1/2,
which is equivalent to 1/2 Erfc[-x/Sqrt[2]].


  • Prev by Date: delete something from a complex list
  • Next by Date: Re: Interrupt[] without confirmation
  • Previous by thread: Mathematica 5.1 Cumulative Normal Definition
  • Next by thread: Mathematica program generating sequence of points stalls for no apparent reason.