Re: fast calculation of normal distribution ...

2000-10-27 Thread Gökhan
> I presume that you want the density of a multivar normal distrib. You > don't calculate the inverse; you just need the quadratic form. I think > that Searle's matrix algebra book gives the computations. off hand, for > the quad form x'A-1x I'd get the cholesky factor of A = LL' and solve >

Re: fast calculation of normal distribution ...

2000-10-27 Thread Gökhan
Alan Miller schrieb: > Mention of the covariance matrix suggests that it is > the multivariate normal which is wanted, not the simple > univariate normal. Of course the multivariate normal. > The multivariate normal integral is much more difficult. To be concrete i have to calculate the dens

Re: fast calculation of normal distribution ...

2000-10-26 Thread Alan Miller
Gökhan wrote in message <[EMAIL PROTECTED]>... > >Hi! >I wonder how the public is evaluating the normal distribution function >in realworld applications. I am implementing some methods where i have >to calculate different times probability functions relying on normal >distribution functions with

Re: fast calculation of normal distribution ...

2000-10-26 Thread Elliot Cramer
G?khan <[EMAIL PROTECTED]> wrote: : Hi! : I wonder how the public is evaluating the normal distribution function I presume that you want the density of a multivar normal distrib. You don't calculate the inverse; you just need the quadratic form. I think that Searle's matrix algebra book gives

fast calculation of normal distribution ...

2000-10-26 Thread Gökhan
Hi! I wonder how the public is evaluating the normal distribution function in realworld applications. I am implementing some methods where i have to calculate different times probability functions relying on normal distribution functions with steadily changing covariance matrix and mean values.