Re: multivariate normal with zero covariances?

2001-04-17 Thread Lonnie Hamm
Thanks for the help. The answer should have been obvious to me if I would have bothered to actually look at the form of the multivariate normal pdf. Lonnie "Charles Metz" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Lonnie Hamm wrote: > > > Suppose I want

Re: multivariate normal with zero covariances?

2001-04-16 Thread Charles Metz
Henry wrote: > On Fri, 13 Apr 2001 15:50:55 -0500, Charles Metz <[EMAIL PROTECTED]> > wrote: > > This follows directly > >from the fact that uncorrelated *normal* random variables > >are independent (which can be proven by examining the form > >of the general multivariate normal density fu

Re: multivariate normal with zero covariances?

2001-04-14 Thread Henry
On Fri, 13 Apr 2001 15:50:55 -0500, Charles Metz <[EMAIL PROTECTED]> wrote: > This follows directly >from the fact that uncorrelated *normal* random variables are >independent (which can be proven by examining the form of the general >multivariate normal density function when its covariance matrix

Re: multivariate normal with zero covariances?

2001-04-13 Thread Horst Kraemer
On Thu, 12 Apr 2001 16:11:48 -0500, "Lonnie Hamm" <[EMAIL PROTECTED]> wrote: > Suppose I want to generate a vector of n normal deviates with the standard > deviation the same for all elements and the covariances are zero. Since the > covariances are zero, is there such a thing as a multivariate

Re: multivariate normal with zero covariances?

2001-04-13 Thread Charles Metz
Lonnie Hamm wrote: > Suppose I want to generate a vector of n normal deviates > with the standard deviation the same for all elements and > the covariances are zero. Since the covariances are zero, > is there such a thing as a multivariate normal deviate > in this case Yes (see below).

multivariate normal with zero covariances?

2001-04-13 Thread Lonnie Hamm
Suppose I want to generate a vector of n normal deviates with the standard deviation the same for all elements and the covariances are zero. Since the covariances are zero, is there such a thing as a multivariate normal deviate in this case or can I just generate a univariate normal for each of t