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Cabamap v1.0 Released
Posted by Joey on 25 February 2004, 23:41 GMT

Our beloved news editor, Michael Vincent, has released version 1.0 of his Cabamap application for the TI-83 Plus. You will find this program very useful if you ever need to calculate the exact value of 21024, or any other huge number. The fast routines in this program allow it to make calculations at more than twice the speed of the TI-89. Cabamap was a runner-up in TI's 2003 App Development Contest.

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Re: Cabamap v1.0 Released
Joey Gannon  Account Info
(Web Page)

Michael and I actually discussed Cabamap before its initial release while we were wandering around Fry's Electronics. Though I still don't have a real use for it, it's an awesome program.

Reply to this comment    25 February 2004, 23:42 GMT

Re: Re: Cabamap v1.0 Released
8weim8  Account Info

wow... big numbers...

Reply to this comment    25 February 2004, 23:45 GMT


Re: Re: Cabamap v1.0 Released
KermMartian  Account Info
(Web Page)

Any clue where the name "Cabamap" came from?
Great program, by the way, if not exactly useful in my everyday calculus classes :-D

Reply to this comment    26 February 2004, 13:52 GMT


Re: Re: Re: Cabamap v1.0 Released
Rob van Wijk  Account Info

It stands for "CAlculator BAsed MAthematics Platform".

Reply to this comment    26 February 2004, 14:07 GMT


Re: Re: Re: Re: Cabamap v1.0 Released
Morgan Davies  Account Info
(Web Page)

I was wondering where the "A"'s came from...thought he just put one in-between each letter of the first letter of the above words.

Reply to this comment    26 February 2004, 19:15 GMT


Re: Re: Re: Re: Re: Cabamap v1.0 Released
no_one_2000_  Account Info
(Web Page)

I was wondering the same thing.

This program looks neat. It would be really helpful when doing problems that involve a lot of large numbers.

Reply to this comment    26 February 2004, 20:42 GMT

Re: Cabamap v1.0 Released
Paul Nickerson  Account Info

Does it do pi?

Reply to this comment    25 February 2004, 23:54 GMT


Re: Re: Cabamap v1.0 Released
Paul Nickerson  Account Info

Oh wait, it's for "long integer calculations", I guese that would be a no.

Reply to this comment    26 February 2004, 00:01 GMT


Re: Re: Re: Cabamap v1.0 Released
Michael Vincent  Account Info
(Web Page)

Actually it very well could if you wrote the appropriate algorithm. I believe many pi computing methods use long integers for the calculations.

There's a jump table in the start of the app that can be used to call almost every routine. I haven't written the documention on this yet though.

Reply to this comment    26 February 2004, 00:02 GMT

Re: Re: Re: Re: Cabamap v1.0 Released
angelboy  Account Info
(Web Page)

Will you ever use floating numbers? I've had this program on my calc for about a month and half now, and I would use it much more often if it supported floating digits. (Such as the math test today, where I could have checked if 99!*100! is a square. ;)

Reply to this comment    26 February 2004, 03:06 GMT

Re: Re: Re: Re: Re: Cabamap v1.0 Released
Sean Barnes  Account Info

FYI 100!*99! is a perfect square: (99!*10)^2

Reply to this comment    26 February 2004, 05:55 GMT


Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
angelboy  Account Info
(Web Page)

I knew that, but there were a few other options I had to choose from

Reply to this comment    26 February 2004, 12:33 GMT


Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Rob van Wijk  Account Info

Oh common, that's easy:
100! = 100 * 99!
So 99! * 100! = 99! * 99! * 100
That means that sqrt(99! * 100!) = sqrt(99! * 99! * 100) = 99! * sqrt(100) = 99! * 10
See, absolutely no need for Cabamap! Not to mention that Cabamap won't tell you if a number is a perfect square, Cabamap's sqrt(x) function actually performs int(sqrt(x)).

Reply to this comment    26 February 2004, 14:11 GMT

Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
no_one_2000_  Account Info
(Web Page)

It also says that to take the AMC10, you don't need a calculator, but it is recommended. :-D I guess that prepares you for the mindset to take the next test that follows the AMC (AIME).

Reply to this comment    26 February 2004, 20:46 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Paul Nickerson  Account Info

I just took the AMC, I made 3 BASIC programs durring the test to solve 3 of the questions. That's allowed (I hope).

Reply to this comment    27 February 2004, 01:01 GMT

Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
KermMartian  Account Info
(Web Page)

I think I made 2 on the fly (AMC12)

Reply to this comment    27 February 2004, 14:54 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Konrad Meyer  Account Info
(Web Page)

Excuse me for asking, but what's the AMC and AIME? (What math level?)

Reply to this comment    29 February 2004, 06:44 GMT

Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Blah Poop  Account Info
(Web Page)

AME 10 - Elementary Math ~ Geometry
AME 12 - Elementary Math ~ Calculus BC

AME 10 - Math, Pre-Algebra, Algebra 1, Algebra 2, Geometry.
AME 12 - Math, Pre-Algebra, Algebra 1, Algebra 2, Geometry, Trigonometry, Pre-Calculus, Calculus AB, Calculus BC.

Reply to this comment    29 February 2004, 18:12 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Ben Cherry  Account Info
(Web Page)

AMC is the American Math Competition, and you take a short multiple choice test. The AMC 10 is tenth grade stuff and AMC 12 is 12th grade. But the majority of the problems are the same on both tests actually. If you do well enough, then you get invited to the AIME, American Invitational Mathematics Exam (i think thats right). That is another test and they give you 15 problems and 3 hours (i think). Then if you do well its on to the International Mathematics Olympiad.

Reply to this comment    1 March 2004, 03:50 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
no_one_2000_  Account Info
(Web Page)

Yes, it is allowed. The test allows you to use any calculator that's allowed for the SAT. It says nothing about writing programs, so it's fine.

I really should have written some to help me solve the problems. It REALLY would have boosted my score.

*nervous* If I filled in any of the wrong bubbles, then I don't make it to the AIME :(

Reply to this comment    27 February 2004, 20:43 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Chickendude Account Info
(Web Page)

Unless of course the one you wanted to fill in was the wrong one, and you accidentally filled in the right one.

Reply to this comment    8 March 2004, 00:56 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Michael Vincent  Account Info
(Web Page)

99,!,100,!,*,enter,sqrt,square,-

That's how you'd do it.

Reply to this comment    26 February 2004, 23:34 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Rob van Wijk  Account Info

I already assumed you could do it with some work-around, but I didn't exspect it to be this easy. Well, I guess this shows the power of RPN.
BTW, if you actually try that, it still only takes a couple of seconds, that's pretty amazing.

Reply to this comment    27 February 2004, 13:52 GMT


Re: Re: Re: Re: Re: Cabamap v1.0 Released
no_one_2000_  Account Info
(Web Page)

Hey! I took that math test too! And, I think I got the 19/25 that I filled in correct. I should have had 22/25, but oh well. :(

BTW, you probably shouldn't have typed that in. Here's what I did:

"Oh... perfect square... 99!100!... every number from 1 to 99 is paired, and 100 is a perfect square, so that is the answer"

I'm still a little peeved at myself for not getting all of the questions that I should. I basically ran out of time, AND I didn't see the question on the back (number 25), which wasn't really that hard at all. I definitely could have gotten that one in the amount of time that I had left. And for another, I could have written a program to solve it for me... :( I was NOT thinking that day.

Reply to this comment    26 February 2004, 20:45 GMT

Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Paul Nickerson  Account Info

On the *first* question, I converted from numerical to percentage wrong. Stupid mistake :( Oh well, it happens.

Reply to this comment    27 February 2004, 01:07 GMT


Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
no_one_2000_  Account Info
(Web Page)

The first question on the AMC10B delt with multiplication... you must have taken the AMC10A.

Reply to this comment    27 February 2004, 20:44 GMT


Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
jordan krage  Account Info

the "2001+2002-2003=2000, find the 2004 number in this sequence"?
i made a program, but i messed it up, i did 2004 more, when the fist three were included, dam
oh well, i managed a 110

-jordan

Reply to this comment    27 February 2004, 15:50 GMT


Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
no_one_2000_  Account Info
(Web Page)

Oh- that problem didn't need a calculator. Just look at the pattern:

2001, 2002, 2003, 2000, 2005, 1998...

Every other number is its own sequence and either goes up or down by two.

Reply to this comment    27 February 2004, 20:45 GMT

Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
Ben Cherry  Account Info
(Web Page)

Yeah, on most of the problems like that the *wrong* way to do it is to add them up all the way through the long sequence. The *right* way is to find a pattern. A common way to do this is to make the numbers smaller, and it will be easier to understand.

Reply to this comment    28 February 2004, 01:54 GMT


Re: Re: Re: Re: Re: Re: Re: Re: Cabamap v1.0 Released
jordan krage  Account Info

yeah, i ended up figuring out the pattern, but i was off by 4 'sequences' becuase i thought it was 2004 *more*, not the 2004th num in the sequence

-jordan

Reply to this comment    28 February 2004, 02:02 GMT


Re: Re: Re: Re: Cabamap v1.0 Released
darkhydra21 Account Info

of course, if you calculate pi, then you begin to run into memory errors and such because of the infinite variables/lists/string that would have to be set up. The same for calculationg phi or some other infinite decimal number.

Reply to this comment    17 March 2004, 04:33 GMT

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