Re: [tinspire] Window restrictions in G&G

[Marc Garneau]

I'm able to get up to (but not including) 1x10^12. 9.9999999999x10^11
worked, but not after that.
What's interesting (strange) is that after I've set my window to that,
I can drag the axes to increase the domain and the axes end values can
go much higher (I stopped trying after I reached 10^30). But if I
then go to the window settings and press enter, I get the "invalid
value" error. So, it looks like you can get the window range you
want, but you'll have to use a less direct method to do it.

Marc Garneau

On 15-May-09, at 9:15 AM, Igor Pastuhovic wrote:

>
>
> Hi!
>
> Was trying to graph the sun’s black body spectrum on the nSpire when I
> noticed that the calculator only handles y-values up to 1x10^10 (a
> “invalid value”-popup pops up if entering a larger value) resulting in
> no graph being drawn. Maybe I entered it wrong but at least a part of
> the graph should have been visible?
>
> This restriction seems kind of weird since the older(!) TI-84 can
> handle a window that size. Am I doing something wrong?
>
> Thanks!
> Igor
>
> >

[Marc Garneau]

You can drag just the y-axis by holding down the shift key after you
grab it. That way you can get your desired range, as well as keep
your original domain.

What did you mean by the use of constants in G&G?

Marc Garneau

On 15-May-09, at 10:27 AM, Igor Pastuhovic wrote:

>
>
> Thanks for the tip, though dragging the y-axis also moves the x-axis
> and what you get is a small tip in the corner. Using constants inside
> G&G also does not seem to work. Why is this when the older models seem
> to handle these types of curves well?

[Piman]

It won't graph the line because of the unit of the constant. But you
can define a new variable that removes the unit.
e.g.:
c:=_c/(_m/_s)

Graph f1(x)=c and you'll have your graph.

Marc

On May 16, 1:19 am, Igor Pastuhovic <igor.pastuho...@gmail.com> wrote:
> Yes, I finally got it working! Thank you for your help!
>
> And about the constants: entering f1(x)=_c does not give me a line at
> approx y=300000000.
>
> Cheers!