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Author Topic: Graph X= Equations on the TI-83+ Series  (Read 9478 times)

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Offline Hexatron

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Graph X= Equations on the TI-83+ Series
« on: December 19, 2013, 09:48:08 pm »
I want to graph X= equations on the TI-83+ Series.
If I use the inequalz APP, you can only have numbers, not equations (such as sin(y
I have tried doing it with TI-BASIC:
Code: [Select]
Input Str1
For(Y,Ymin,Ymax,.1
pt-on(expr(Str1),Y
EndBut sometimes (as in the case of sin(Y^(Y+1)) or sin(sqrt(y))), this does not work.
So is there any way to do this? (Specifically on the TI-84+CSE but also the TI-83+ to TI-84+SE will work too.)
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Offline dinosteven

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Re: Graph X= Equations on the TI-83+ Series
« Reply #1 on: December 19, 2013, 10:14:05 pm »
First, change the increment from .1 to ΔY; that way, it's accurate.
Secondly, I think the problem is undefined things. The calculator deals with this by not graphing it, but in the program, it's an error. To deal with this, you'll have to use an If to catch all potential errors. I dunno, checking if it's real will definitely get rid of some. If only TI BASIC had a catch() command... You'll have to manually find all possible errors.
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Offline fb39ca4

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Re: Graph X= Equations on the TI-83+ Series
« Reply #2 on: December 20, 2013, 10:16:59 am »
An alternative method is to graph in parametric mode, where Y = T and X = f(T). Make sure you set TMin and TMax equal to YMin and YMax.
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Offline Hexatron

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Re: Graph X= Equations on the TI-83+ Series
« Reply #3 on: December 20, 2013, 05:02:50 pm »
Quote from: fb39ca4 on December 20, 2013, 10:16:59 am
An alternative method is to graph in parametric mode, where Y = T and X = f(T). Make sure you set TMin and TMax equal to YMin and YMax.
Thanks! I'll try it out!
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Offline MGOS

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Re: Graph X= Equations on the TI-83+ Series
« Reply #4 on: December 20, 2013, 05:10:02 pm »
A simple way:
Type your equations as Yn = (Yn being any of the ten equations) - and in the homescreen enter "DrawInv Yn". That swaps X and Y axis around.
« Last Edit: December 21, 2013, 08:39:30 am by MGOS »
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Offline fb39ca4

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Re: Graph X= Equations on the TI-83+ Series
« Reply #5 on: December 20, 2013, 07:00:14 pm »
Quote from: MGOS on December 20, 2013, 05:10:02 pm
A simple way:
Type your equations as Yn = (Yn being any of the then equations) - and in the homescreen enter "DrawInv Yn". That swaps X and Y axis around.
I learned something new today.
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Offline Hexatron

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Re: Graph X= Equations on the TI-83+ Series
« Reply #6 on: December 21, 2013, 08:55:27 am »
Quote from: MGOS on December 20, 2013, 05:10:02 pm
A simple way:
Type your equations as Yn = (Yn being any of the ten equations) - and in the homescreen enter "DrawInv Yn". That swaps X and Y axis around.
Ohhhh Thanks Man!
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