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Calculator Community => TI Calculators => General Calculator Help => Topic started by: Atham on March 04, 2012, 06:03:49 am

Title: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Atham on March 04, 2012, 06:03:49 am

Hey there,
is there a way to make lines such as x = 2 in the TI Nspire CX?

Thanks in advance

~A.T.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Yeong on March 04, 2012, 12:30:16 pm

can't you change y1 to x1 by deleting the Y and replace with X?

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Atham on March 04, 2012, 12:48:24 pm

I tried that. It says
Error
not a function

Mind you I am using the graph type "Function"

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Nick on March 04, 2012, 01:04:57 pm

i don't think there will be one, since a function is something that has only 1 y value per x value.. and since x = 2 has an unlimited number of y values, it won't be possible as a function. maybe as parametric

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: lkj on March 04, 2012, 01:14:24 pm

I think Nick is right, it isn't currently possible.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Atham on March 04, 2012, 01:14:47 pm

I am not familiar with parametric equations yet (I am 14), but I need a way to get x = 2 types of lines.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: GB on March 04, 2012, 01:16:37 pm

If the Nspire allows for drawing of vertical lines on the graph screen, you can draw one at the "2" mark on the X-axis. That's about as close as I know how to get.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: lkj on March 04, 2012, 01:53:34 pm

You could also do f(x)=1000x - 2000. It isn't really vertical, but you can't see the difference.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Chockosta on March 04, 2012, 02:10:46 pm

It's quite easy with parametric equations...

Just use {x1(t)=2, y1(t)=t}

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Jonius7 on March 04, 2012, 05:52:45 pm

It doesn't really work with a function, as the equation would be undefined when trying to express with f(x) or y, but the parametric equation works nicely.
On another note, asymptotes (the vertical ones shown as dotted lines) can also be shown (in a manual fashion though).

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: cyanophycean314 on March 04, 2012, 09:40:54 pm

Parametrically, it works, but you can also do stuff like y=1000(x-b) where to graph x=b for staying in function mode. Basically the same way lkj said.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Adriweb on March 04, 2012, 11:09:48 pm

What about that  :

(http://i43.servimg.com/u/f43/13/23/13/53/32x10.gif)

:D

This is coming with 3.2

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Jonius7 on March 05, 2012, 05:35:49 am

Woo hoo! So need that feature to rotate the sine curve so that x-> y and y-> x.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: cyanophycean314 on March 06, 2012, 08:11:21 pm

 :-\ I don't really need that function that much. It certainly is useful, but I want to keep ndless...  :-\

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: epic7 on March 06, 2012, 10:10:22 pm

Hm, games, or things that actually benefit class...

Meh, I'll keep ndless.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Jonius7 on March 07, 2012, 05:22:36 am

But then again, it's not like anyone else in my maths class would upgrade to even 1.7 anyway, without me telling them how to.
3.1 is great already.

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: proxic on October 29, 2012, 04:29:15 pm

When you are in graph you need to go to the press the menu button then press 3 then 2 then 1 and finally 2 then you can make the equation x=2

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: Yeong on October 29, 2012, 09:44:36 pm

The question was for OS 3.1. :) Also, we (I think) discourage necroposting, which is one like this. (like 6 months apart).

Title: Re: [Ti Nspire CX] - How to make lines such as x = 2
Post by: willrandship on October 30, 2012, 01:28:53 am

It's easier just to graph in parametric mode, as long as the topic got reopened.

Just set y=t, and x=your function. You do have to set t's range large enough in the window, but that's not difficult.