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HP Forum Archive 18

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Calculator Algorithm or Canon F-766S vs TI-89
Message #1 Posted by Joerg Woerner on 3 June 2008, 5:13 p.m.

I just received the new Canon F-766S Scientific calculator and was shocked!

This little thing (US$ 15) is faster than anything I know. The simple 69! calculates instantly.

Mike Sebastian's calculator forensics (inv sin(inv cos(inv tan(tan(cos(sin 9)))))) takes less than 1 second and reports an amazingly precise 14 digits result of 8.9999999817692.

Yes, we know this result! The TI-89 uses the same 14 digits of "precision" and reports the same numbers.

How is this possibly? TI algorithm in Canon calculators? Shareware? Both calcs developed by Inventec?

Please advise...

Regards, Joerg

      
Re: Calculator Algorithm or Canon F-766S vs TI-89
Message #2 Posted by hpnut on 3 June 2008, 10:55 p.m.,
in response to message #1 by Joerg Woerner

Quote:
I just received the new Canon F-766S Scientific calculator and was shocked!

This little thing (US$ 15) is faster than anything I know. The simple 69! calculates instantly.

...

Regards, Joerg


my HP 48G also calculates 69! instantly. what else is shocking about this Canon?

            
Re: Calculator Algorithm or Canon F-766S vs TI-89
Message #3 Posted by Chris Dean on 4 June 2008, 2:31 a.m.,
in response to message #2 by hpnut

My new HP10s gives 9.000000002 after a slight delay.

            
Re: Calculator Algorithm or Canon F-766S vs TI-89
Message #4 Posted by Karl Schneider on 4 June 2008, 2:32 a.m.,
in response to message #2 by hpnut

Quote:
my HP 48G also calculates 69! instantly. what else is shocking about this Canon?

I can discern a slight delay on the HP-48G between entering "FACT" and seeing the result. Perhaps Joerg really means "instantly". My 1993 TI-82 is just about that fast on that calculation, but the HP-15C is faster than either of 'em for me, because factorial is only two keystrokes away.

A better timing test is needed, but it would not surprise me for a modern non-solar calculator to be quite fast at computations. Well-designed and intuitive for a technical professional to use? Now, that would surprise me!

-- KS

                  
Re: Calculator Algorithm or Canon F-766S vs TI-89
Message #5 Posted by Joerg Woerner on 4 June 2008, 9:13 a.m.,
in response to message #4 by Karl Schneider

1) Instantly translates to "I / my eyes and brain" don't recognize any delay. The Canon F-766S is a solar based calculator with a 3V lithium support battery.

2) What else is shocking? Well, it is just a nice calculator:

- The display is the best I ever saw. The characters are large and have a perfect, adjustable contrast.

- It features in HEX,OCT and BIN mode e.g. XNOR

- It has 38 formulas programmed, e.g. E=Q/(4*PI*epsilon*r*r) and it requests the values with a prompting menue.

- It displays the "i" in complex calculations

- It has a very nice equation solver

- Gene W.: Six regression models: lin, log, exp, pwr, inv, quad

- Some goodies like 17 memories, LCM and GCD etc.

- And, by the way, the keyboard is very good. Not a solid click but more resistance than the lousy Sharps and average Casio keyboards. If you know the Canon F-710 etc - this one is much better!

The deal itself is much better than any Casio or Sharp calculator in the $10..$30 price range...

Regards, Joerg

                        
Re: Calculator Algorithm or Canon F-766S vs TI-89
Message #6 Posted by mjcohen on 26 June 2008, 5:59 p.m.,
in response to message #5 by Joerg Woerner

The Canon looks nice.

I prefer my Sharp EL-506W: $15, over 450 functions, bit fiddling with operators on shifted keys, and base 5 (Pental)!

Also does 2x2 and 3x3 systems, matrices (up to 4x4), stats, and complex calculations.

                        
Re: Calculator Algorithm or Canon F-766S vs TI-89
Message #7 Posted by reth on 27 June 2008, 7:09 a.m.,
in response to message #5 by Joerg Woerner

So what? I get it you found the calculatur of your life. I don't care about that. At least in this forum

      
Re: Calculator Algorithm or Canon F-766S vs TI-89
Message #8 Posted by Gunnar Degnbol on 4 June 2008, 10:54 a.m.,
in response to message #1 by Joerg Woerner

Quote:
How is this possibly? TI algorithm in Canon calculators? Shareware? Both calcs developed by Inventec?
It is possible if they both round the same way (e.g. down), and don't have any bugs, at least for the particular operations on the particular values involved in the calculation. Then they should get the same results when they use the same number of digits.


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