iPad function transformations

[idomath]

Does anyone have any tricks for making a function translate vs. rotate on the iPad app?  It doesn't seem that "being toward the center of the screen" always translates like I thought it might.  At least on the HH you get a crosshair to let you know a translation is about to occur. 

 

Thanks!

[Tony]

Vertical parabola and exponential gave no problem translating;
horizontal hyperbola no effect...iPad2

Is it possible that only specific functions can translate with the
finger touching; the higher definition iPad3/4 may work better...

Tony

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[Travis Bower]

quick recall:

Yes: lin, quad, sin/cos, ln, e^x

NO: cubic+, tan, recip trig

Touch near a locator point [vertex or min/max] for trans.

I'm not sure rotate is possible.

Horiz stretch: touch away from locator point.

I'm ambivalent about the missing icons...I need to ponder that.

On Fri, Jun 7, 2013 at 12:51 PM, Tony <abca...@gmail.com> wrote:

Vertical parabola and exponential gave no problem translating; horizontal hyperbola no effect...iPad2

Is it possible that only specific functions can translate with the finger touching; the higher definition iPad3/4 may work better...

Tony

On 6/7/2013 1:56 PM, idomath wrote:

Does anyone have any tricks for making a function translate vs. rotate on the iPad app?  It doesn't seem that "being toward the center of the screen" always translates like I thought it might.  At least on the HH you get a crosshair to let you know a translation is about to occur.
Thanks!
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[idomath]

I have a 4th generation.  It seems to only give me a problem for translation with the first function I enter on the graphs page.  Once I finally get it to translate, it will continue to do so.  Also any subsequent function I enter is always fine with a "middle of the graph" tap to translate. 

[idomath]

You're right, Travis, and I didn't actually mean rotate...I was thinking of the icon that appears on the HH and really did mean horizontal stretch.  Try entering f(x)=x+3 (on a new graphs page) and translate from around the y-intercept.  Do you have a problem?

 

On Friday, June 7, 2013 2:59:17 PM UTC-5, Travis Bower at DPHS wrote:

quick recall:

Yes: lin, quad, sin/cos, ln, e^x

NO: cubic+, tan, recip trig

Touch near a locator point [vertex or min/max] for trans.

I'm not sure rotate is possible.

Horiz stretch: touch away from locator point.

I'm ambivalent about the missing icons...I need to ponder that.

On Fri, Jun 7, 2013 at 12:51 PM, Tony <abca...@gmail.com> wrote:

Vertical parabola and exponential gave no problem translating; horizontal hyperbola no effect...iPad2

Is it possible that only specific functions can translate with the finger touching; the higher definition iPad3/4 may work better...

Tony

On 6/7/2013 1:56 PM, idomath wrote:

Does anyone have any tricks for making a function translate vs. rotate on the iPad app?  It doesn't seem that "being toward the center of the screen" always translates like I thought it might.  At least on the HH you get a crosshair to let you know a translation is about to occur.
Thanks!
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[Sean Bird]

Horizontal and vertical translation works by dragging the graph near the middle of where it appears on the graph (not always the middle of the graph), and rotating or changing the spread is done by dragging the function near the edges.

(Great seeing you, Kara, at the workshop. I appreciated your valuable contributions.)

- Sean Bird