Re: do repeat

Posted by Jon K Peck on
URL: http://spssx-discussion.165.s1.nabble.com/do-repeat-tp5719707p5719764.html

True.  Which gives you 10**+/-308 or so as the range of floating point numbers.


Jon Peck (no "h") aka Kim
Senior Software Engineer, IBM
[hidden email]
phone: [phone]




From:        Richard Ristow <[hidden email]>
To:        [hidden email],
Date:        04/26/2013 11:38 AM
Subject:        Re: [SPSSX-L] do repeat
Sent by:        "SPSSX(r) Discussion" <[hidden email]>

---

At 12:32 PM 4/25/2013, David Marso wrote:

>I suppose my MATRIX hack is a little unorthodox but by choosing an
>INFINITESIMAL term to add to the vector I don't need to explicitly
>check and it comes back into SPSS with a fudge factor which can not
>be detected in the precision available to the main system.
>Now, I have no idea how MATRIX can represent such very small values
>and avoid the zero divide infinity.

I've seen nothing explicit, but I assume MATRIX uses the same number
representation as the main system: 64-bit binary floating, per IEEE
standard 754; with 53-bit precision.

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