HP Forum Archive 21

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wp-34s (Inconsistent Behavior) Message #1 Posted by Barry Mead on 22 July 2013, 8:50 p.m. I noticed an unexpected inconsistency in the Factorial function. The manual says that Gamma(0) or Factorial(-1) will result in a "Domain Error". However Factorial(-1) results in a "+ Infinity Error" instead. Taking the Factorial of all other negative whole numbers (-2 .. -whatever) does give a "Domain Error", but Factorial(-1) is the oddball. Since the Factorial of any negative whole number results in a discontinuous point neither + Infinity or - Infinity, I would think that "Domain Error" would be more correct than "+ Infinity Error". What do you think? I confirmed this behavior on firmware version 3432 on the real calculator and version 3430 of the emulator. So I don't think it has been fixed yet. I noticed another (ODDITY) on the QT Emulator only. If you have the calculator in FIX 11 display mode You have Edit Preferences Display Use Real Fonts Checked You press [2] [+/-] [Enter] [Green] [!] The Domain Error appears, but the trailing zeros from the underlying -2.000000000 still appear after Resulting in "Error0000000" in the number part of the display. I confirmed that ln(0000000000000) does the same thing as well as tan(90.000000000) in degrees mode etc. It seems that most errors don't clear the filled number part of the display before overwriting with the word "Error". If you uncheck "Edit Preferences Display Use Real Fonts" or use the real calculator this problem does not occur only in the QT Emulator with Real Fonts. Edited: 22 July 2013, 9:15 p.m.

Re: wp-34s (Inconsistent Behavior) Message #2 Posted by Paul Dale on 22 July 2013, 9:37 p.m., in response to message #1 by Barry Mead The +ve infinite result is a bug. I've fixed this now and it will be part of the next build. Can't help with the emulator display however. - Pauli

Re: wp-34s (Inconsistent Behavior) Message #3 Posted by Marcus von Cube, Germany on 23 July 2013, 2:54 a.m., in response to message #2 by Paul Dale I've uploaded a new build to SVN.

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