"Scott S" <[EMAIL PROTECTED]> wrote in message news:<B7XS9.241514$[EMAIL PROTECTED]>... > Does anyone know the formula for recursively calculating standard deviation?
I use Nnew = Nold + 1 Mnew = Mold + (xnew-Mold)/Nnew Vnew = Vold + [(xnew-Mold)(xnew-Mnew)-Vold]/Mold Snew = sqrt(Vnew) Hope this helps. Greg . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
