yet another pointless blog…

And so, i was getting bored - actually, it was me and Chew… and i guess we were both bored. or something.

Anyway, i decided to explore my TI-84 Plus Graphing Calculator. Inexplicably, i had this urge to program - yes, on my GC, no, not using any other interface but the GC keypad - a cross product function.

Somehow or other, Chew got dragged into it =P

It works, sorta, for all rational numbers between -999 and 999.

Here’s the program (i take credit for about half of it. lol)

:ClrHome
:Output(8,1,"CROSS PRODUCT")
:Prompt I,J,K,L,M,N
:ClrHome
:Disp JN-KM => Frac
:Disp LK-IN => Frac
:Disp IM-JK => Frac
:Fix 2
:Output(5,1,I
:Output(5,9,L
:Output(6,1,J
:Output(6,8,*
:Output(6,9,M
:Output(7,1,K
:Output(7,9,N
:Float

It doesnt seem right, tho, that the manipulation of the Display Screen (all the Output lines), take up way more space than the actual calculations….

But what the heck, it works. =D
Just don’t get it to manipulate irrational numbers (like pi).
Or those that are too large.
[ Well, it *can*, just not accurately.]

———
eve really should be studying more.

This entry was posted on Saturday, August 11th, 2007 at 10:44 pm and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.