mersenneforum.org Bugs in apple calculator
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 2011-05-10, 00:02 #1 diep     Sep 2006 The Netherlands 26×11 Posts Bugs in apple calculator hi, I noticed it a lot already. Bugs in the apple calculator at my macbookpro. I have os/x 10.4.11 First how it goes correct. I type in manual by mouse: 10 Y^X 1.24 = 17..... Now when it goes wrong. I give in 2048^2 * 42 then take log of that, divided by 2048^2 and the log of that. This gives 1.245.... I store that with M+ Then i give in by hand 10 Y^X MR = 101 I give C to clear screen. Give in 10. to the power MR (1.245...) again 101 as answer. Maybe not calculate your mortgage with apple sirs! Regards, Vincent
2011-05-10, 00:07   #2
science_man_88

"Forget I exist"
Jul 2009
Dumbassville

26×131 Posts

Quote:
 Originally Posted by diep hi, I noticed it a lot already. Bugs in the apple calculator at my macbookpro. I have os/x 10.4.11 First how it goes correct. I type in manual by mouse: 10 Y^X 1.24 = 17..... Now when it goes wrong. I give in 2048^2 * 42 then take log of that, divided by 2048^2 and the log of that. This gives 1.245.... I store that with M+ Then i give in by hand 10 Y^X MR = 101 I give C to clear screen. Give in 10. to the power MR (1.245...) again 101 as answer. Maybe not calculate your mortgage with apple sirs! Regards, Vincent
first of all what type of log I can't figure it out.

2011-05-10, 00:27   #3
science_man_88

"Forget I exist"
Jul 2009
Dumbassville

26×131 Posts

Quote:
 Originally Posted by science_man_88 first of all what type of log I can't figure it out.
figured out what was mean't in the log part I think.

2011-05-10, 02:05   #4
Christenson

Dec 2010
Monticello

111000000112 Posts

Quote:
 Originally Posted by diep hi, I noticed it a lot already. Bugs in the apple calculator at my macbookpro. I have os/x 10.4.11 First how it goes correct. I type in manual by mouse: 10 Y^X 1.24 = 17..... Now when it goes wrong. I give in 2048^2 * 42 then take log of that, divided by 2048^2 and the log of that. This gives 1.245.... I store that with M+ Then i give in by hand 10 Y^X MR = 101 I give C to clear screen. Give in 10. to the power MR (1.245...) again 101 as answer. Maybe not calculate your mortgage with apple sirs! Regards, Vincent
Doesn't duplicate on WinXP Calculator 5.1. Please indicate that you are dividing by log10(2048^2), should get 17.583....

 2011-05-10, 02:23 #5 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 3×3,109 Posts FWIW, it is easy to confuse a dumb and clever design. -- Example! (in voice of Julius and Vincent from Pulp Fiction) In Win calc, try typing 2+3*5 => you will get 17 in scientific mode, but 25 in standard mode. Is that dumb? Not necessarily! In some (or most?) modes log button is treated as an immediate postfix to the number on the screen. This makes possible to do 5 * 3 where log will be applied to 3 only. However, I have no Mac to test if this applies to your problem. ymmv.
 2011-05-10, 02:33 #6 Christenson     Dec 2010 Monticello 5×359 Posts I loved having my result erased when I switched to scientific mode to get the log function in Win Calc!
2011-05-10, 19:44   #7
science_man_88

"Forget I exist"
Jul 2009
Dumbassville

20C016 Posts

Quote:
 Originally Posted by Christenson Doesn't duplicate on WinXP Calculator 5.1. Please indicate that you are dividing by log10(2048^2), should get 17.583....
I only figured the log part as:

Code:
(14:42)>log(2048^2*42)/log(2048^2)
%181 = 1.245105337399034558586168557
just to note this should work out to the 1.24... for any log base but I still don't know the rest.

Last fiddled with by science_man_88 on 2011-05-10 at 19:45

2011-05-10, 21:56   #8

"Richard B. Woods"
Aug 2002
Wisconsin USA

22·3·641 Posts

Quote:
 Originally Posted by Batalov FWIW, it is easy to confuse a dumb and clever design. -- Example! (in voice of Julius and Vincent from Pulp Fiction) In Win calc, try typing 2+3*5 => you will get 17 in scientific mode, but 25 in standard mode. Is that dumb? Not necessarily!
Scientific mode has operator precedence by default??? Can't see that in Help. Since I don't trust non-RPN grouping, I've always used = and (), so never encountered that before.

2011-05-10, 21:59   #9

"Richard B. Woods"
Aug 2002
Wisconsin USA

1E0C16 Posts

Quote:
 Originally Posted by Christenson I loved having my result erased when I switched to scientific mode to get the log function in Win Calc!
Gotta use MS/MR.

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