Faster inverse gamma and factorial for the WP 34S

02062015, 07:39 AM
(This post was last modified: 02062015 07:51 AM by BarryMead.)
Post: #10




RE: Faster inverse gamma and factorial for the WP 34S
Inverse Gamma Accuracy Issue.
Bit: When I enter the following into wolfram alpha: 1.5=gamma(x) solve for x, I get an answer: 2.6627663453201472954412987 When I enter 1.5 and use the compiled inverse gamma function on the wp34sgui_Bit.exe eumulator, in double precision mode I get 2.705794548255370. If I use the same compiled wp34s.dat image on the QT emulator, or the wp34sgui.exe (non _Bit) emulator, I get the same answer as wolfram alpha. Also if I use the _Bit emulator in single precision mode I seem to get the same answer (less digits) as wolfram alpha. Why is that? 

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