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Offline holmes221b

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Inputting Data into a Matrix
« on: December 09, 2010, 03:10:39 pm »
I was flipping through my pre-calculus textbook the other day and I came across a problem involving cryptography and matrices, specifically something called a Q32 Fibonacci encryption matrix. Being the sort of person I am, I immediately decided I needed to code a TI-BASIC program utlizing this method of encryption.
But the only problem is that I can't seem to figure out/remember how to input data into a matrix--I keep getting either ERR: DIM or ERR: DATA TYPE for the key matrix, no matter what I try.

And how would one go about inputting user selected variables into a matrix? I've currently got the following bit of code in my cal for this, but until I can figure out how to input data into a matrix the code remains untested.
Code: [Select]
:Prompt A,B,C,D,E,F,G,H,I
:[[A,B,C][D,E,F][G,H,I]]->[J]
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Offline AngelFish

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Re: Inputting Data into a Matrix
« Reply #1 on: December 09, 2010, 03:12:27 pm »
Did you make sure you're using the [J] token and not just typing it in?
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Offline holmes221b

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Re: Inputting Data into a Matrix
« Reply #2 on: December 09, 2010, 03:14:13 pm »
I am using the token.
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Offline AngelFish

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Re: Inputting Data into a Matrix
« Reply #3 on: December 09, 2010, 03:25:53 pm »
Yeah, I can't get it to work either.
However, you can do

Code: [Select]
List▶matr({A,D,G},{B,E,H},{C,F,I},[J]
and it will store them to the matrix.
« Last Edit: December 09, 2010, 03:26:32 pm by Qwerty.55 »
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Offline FinaleTI

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Re: Inputting Data into a Matrix
« Reply #4 on: December 09, 2010, 03:28:42 pm »
I just tested the code from the first post on my calc and it works perfectly.
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Offline holmes221b

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Re: Inputting Data into a Matrix
« Reply #5 on: December 09, 2010, 03:32:38 pm »
Huh, whatever was the problem with the code when I first tried it, it's working now that I've added a menu to the program. xD

Thanks for your help though. I might just use your suggestion anyways in this code, it looks much neater than storing the values straight to the matrix.
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Offline DJ Omnimaga

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Re: Inputting Data into a Matrix
« Reply #6 on: December 09, 2010, 05:46:01 pm »
This code is neat, because it doesn't update the Ans variable, thus, less risks of ERR:MEMORY messages under low RAM conditions.
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