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by ioualalen
December 16th, 2015, 9:40 am
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

Hi,thanks a lot for all of this, I start to analyze this ASAP !
by ioualalen
December 14th, 2015, 7:28 am
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

<t>Hi everyone, sorry about my absence this weekend.QuoteOriginally posted by: CuchulainnQuoteOriginally posted by: Traden4AlphaQuoteOriginally posted by: CuchulainnDo these reservations also hold for this expansion?ABSOLUTELY! There's no guarantee that the numerical result of this computation lies ...
by ioualalen
December 10th, 2015, 2:10 pm
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

<r>Hello again everyone,just a quick update, I had to look at your code Cuchulainn with the quiet NaN. It turns out that the calculation does not produce a NaN but a -oo as log(0.0/65.0) is not NaN. Therefore you ends up dividing by -oo at some point then set everything to zero and returns zero. But...
by ioualalen
December 8th, 2015, 12:14 pm
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

<r>Hi Cuchulainn, of course, a numerical drift is a progressive gap between the value you want to calculate and the value you get using floating-point arithmetic. The case of the Patriot missile is a good example of that. Here, below, in a nutshell how it goes. During the loop the value calculated a...
by ioualalen
December 8th, 2015, 7:06 am
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

<t>Hi everyone,Thank again for the vivid debate, it is very interesting for me to see that this topic is interesting for you.Quote This reminds me a bit of IBM/Rational '-ify' products like purify, quantify etc. A non-finite number and a memory leak are not a million miles apart?I am not sure that w...
by ioualalen
December 7th, 2015, 7:01 am
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

<t>Hi everyone, and thank again for all of your advices. That?s very helpful.QuoteI know(ish) the owner of this company, Indeed outrun! FPGA and GPU are very hot for us right now, we are still learning about the opportunities our technology represents for them. Any external and relevant opinion inte...
by ioualalen
December 4th, 2015, 1:07 pm
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

<r>Hi everyone, and sorry for the long delay of my answer! First let me thank you for all you responses.OK so let me try to answer you all.QuoteIt sounds technically very interesting, have you written papers? Yes during my PhD I have wrote several papers, you can find them on my webpage on the unive...
by ioualalen
December 3rd, 2015, 3:20 pm
Forum: Programming and Software Forum
Topic: Numerical accuracy and performance ?
Replies: 73
Views: 6522

Numerical accuracy and performance ?

<t>Hi everyone, first of all, I am new in this forum and to this kind of topic, but I have been talking to tagoma by mail, and he told me to try my chances here too. So I hope I am not going to say something (too) irrelevant for you, however I think that what I am about to ask you is fairly uncommon...
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