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GraphingCalcUsers · User group for Pacific Tech's Graphing Calculator math education visualization software
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Messages 1586 - 1615 of 1647   Oldest  |  < Older  |  Newer >  |  Newest
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1586
I'm just wondering is there any way to specify initial conditions for an ordinary differential equation, for instance dy/dx = ky, y(0) = 2...
dgorbachev
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Jan 19, 2009
6:39 am
1587
... No initial conditions can be specified explicitly with GC 3.5, however you can move the cross-hair in such a way as to see the curve matching any given...
Chris Young
c1572young
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Jan 19, 2009
5:22 pm
1588
You can use the color box to get just one curve Makes this much easier Move curve to the point Just watch coordinates...no need to plot lines ... Re:...
Kevin Farrell
kjf103057
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Jan 20, 2009
11:43 am
1589
Eventually maybe this could lead to ways of visualizing different numerical integration methods for ODEs. One thing we notice is that the solution curves...
Chris Young
c1572young
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Jan 21, 2009
10:12 am
1590
Hoping to get some visual insight into how each function curve is threaded through the slope field by numerical solution procedures, e.g. Runge-Kutta method. ...
Chris Young
c1572young
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Jan 22, 2009
12:01 pm
1591
As long as we've got an integrable function of x on the right hand side, we can integrate.  The integrator at http://integrals.wolfram.com/index.jsp works, ...
Chris Young
c1572young
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Jan 22, 2009
12:36 pm
1592
The slider can be used to vary the k coefficient.   The slider can be used to vary the k  coefficient....
Chris Young
c1572young
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Jan 22, 2009
12:56 pm
1593
Sorry, I wasn't showing all the slope segments due to a typo in one of the equations.   Sorry, I wasn't showing all the slope segments due to a typo in...
Chris Young
c1572young
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Jan 22, 2009
1:00 pm
1594
For some reason I couldn't take the derivative of the unit tangent the way I wanted to, so the tubes may get a little distorted in places. However, you can...
Chris Young
c1572young
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Jan 24, 2009
9:30 pm
1595
Here's why the spiral gets kinky. The way the drawing is done is to twist each segment between the "hoops". So the tube will be narrower in the middle.  ...
Chris Young
c1572young
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Jan 24, 2009
9:42 pm
1596
Just derives from rule of exponents. I guess the apparent lack of symmetry between the general exponential, and the general logarithm is due to the Chain Rule...
Chris Young
c1572young
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Jan 24, 2009
10:06 pm
1597
The function for the unit tangent is working OK, but GC doesn't like the exression for the unit normal I have, although it's correct mathematically.   ...
Chris Young
c1572young
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Jan 24, 2009
10:28 pm
1598
The monkey is seated in the Frenet–Serret frame http:// en.wikipedia.org/wiki/Frenet_formulas   The monkey is seated in the  Frenet–Serret frame ...
Chris Young
c1572young
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Jan 24, 2009
11:00 pm
1599
Here, the tubes get distorted: I think I've fixed it below, by just normalizing the binormal....
Chris Young
c1572young
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Jan 24, 2009
11:00 pm
1600
Got the monkey seated upright by reversing one sign:   Got the monkey seated upright by reversing one sign:...
Chris Young
c1572young
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Jan 24, 2009
11:03 pm
1601
 ...
Chris Young
c1572young
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Jan 24, 2009
11:16 pm
1602
An attempt to contrast a curve with no torsion (the plane sine curve), with a twisting one (the wobbly sine curve). The chick on the easy roller coaster stays...
Chris Young
c1572young
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Jan 25, 2009
10:28 am
1603
An attempt to contrast a curve with no torsion (the plane sine curve), with a twisting one (the wobbly sine curve). The chick on the easy roller coaster stays...
Chris Young
c1572young
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Jan 25, 2009
10:33 am
1604
Looking through the demos, I see some things that as far as I know are not documented or hardly mentioned in any of my reading about graphing calculator. Is...
johnalbers2003
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Feb 18, 2009
9:25 pm
1605
... It's actually the points "a" and "b", represented by complex numbers, that are being dragged around.   You can have any points draggable by assigning...
Chris Young
c1572young
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Feb 19, 2009
6:44 am
1606
On Feb 18, 2009, at 3:08 PM, johnalbers2003 wrote: > Looking through the demos, I see some things that as far as I know are > not documented or hardly...
Chris Young
c1572young
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Feb 19, 2009
6:45 am
1607
Graphing variables, such as t (for parametric lines) and u and v (for parametric surfaces) are sort of like paint brushes which are applied to the vectors you...
Chris Young
c1572young
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Feb 19, 2009
7:20 am
1608
I am looking at examples/two dimensions/tangent line to a function and would like to know how they entered the notation for the derivative of f(x) vertical bar...
johnalbers2003
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Feb 23, 2009
9:28 pm
1609
... I lost the original example, but here's an attempt to do a version where the length of the arrow is equal to the value of the derivative.  To get the...
Chris Young
c1572young
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Feb 24, 2009
12:38 am
1610
Suppose that I click on a contour plot and begin tracing around a level curve. Graphing calculator displays the x and y coordinates of where my cursor is....
johnalbers2003
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Feb 24, 2009
9:57 pm
1611
... Although GC doesn't have a way to access the cursor position for use in equations, there are a variety of not-too-difficult workarounds.  For example,...
Chris Young
c1572young
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Feb 25, 2009
6:29 am
1612
Here's a way to show the 3D function corresponding to the 2D one. Any function can be entered in. As you drag the 2D point around (following contours if you...
Chris Young
c1572young
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Feb 25, 2009
8:32 am
1613
Just stumbled upon an interesting-looking plot here. If you've got a fairly advanced computer, GC will do beautiful, razor- sharp clipping that let's you make...
Chris Young
c1572young
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Feb 25, 2009
8:51 am
1614
I periodically go to pacific tech's website and it looks like it has not be updated in a very very very very very ... long time. It is a little bit troubling...
johnalbers2003
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Feb 25, 2009
8:28 pm
1615
... Hello, Lights are still on. Work is proceeding. The web site has not been changed in some time, true, as the currently shipping software remains Graphing...
Ron Avitzur
rxa31107
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Feb 25, 2009
9:41 pm
Messages 1586 - 1615 of 1647   Oldest  |  < Older  |  Newer >  |  Newest
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