On Thu, May 8, 2008 at 11:18 AM, David Cournapeau <[EMAIL PROTECTED]> wrote:
> On Fri, May 9, 2008 at 2:06 AM, Nadav Horesh <[EMAIL PROTECTED]> > wrote: > > Is the 80 bits float (float96 on IA32, float128 on AMD64) isn't enough? > It has a 64 bits mantissa and can represent numbers up to nearly 1E(+-)5000. > > It only make the problem happen later, I think. If you have a GMM with > million of samples of high dimension with many clusters, any "linear" > representation will fail I think. In a sense, the IEEE format is not > adequate for that kind of computation. > David, what you are using is a log(log(x)) representation internally. IEEE is *not* linear, it is logarithmic. Chuck
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