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%NFACT bug
01-08-2014, 03:01 AM
Post: #1
David Hayden Offline
Senior Member
 		Posts: 462
Joined: Dec 2013
%NFACT bug
It appears to me that the System RPL entry %NFACT on my 50g doesn't work properly. This computes the factorial of a real number. Note that it's different from %FACT which computes gamma(x+1) and works correctly.

%NFACT appears to return IP(ABS(x))! There are 2 bugs
  1. It doesn't honor system flag 22 when the result overflows. It returns 9.99999999999E499, even if the flag is clear
  2. If x is between -1 and 1 (exclusive of the endpoints), it return 9.99999999999E499 instead of 1.


Hoping that someone can confirm or explain to me why I'm wrong.

Thanks,
Dave
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Messages In This Thread
%NFACT bug - David Hayden - 01-08-2014 03:01 AM
RE: %NFACT bug - Han - 01-08-2014, 03:14 AM
RE: %NFACT bug - David Hayden - 01-08-2014, 01:32 PM
RE: %NFACT bug - Han - 01-08-2014, 06:12 PM
RE: %NFACT bug - David Hayden - 01-09-2014, 03:02 AM



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