Thanks, David. Next time, I'll just send you the worksheet. ;-) Rob
On Feb 15, 6:56 pm, David Joyner <wdjoy...@gmail.com> wrote: > Thanks! > > I created worksheets from them and posted them > tohttp://sage.math.washington.edu/home/wdj/teaching/worksheets/beezer/ > > On Sun, Feb 15, 2009 at 7:04 PM, Rob Beezer <goo...@beezer.cotse.net> wrote: > > > I took some time the past couple of days to learn the interact setup, > > and built a couple of demos for Monday's session of multivariable > > calculus. They are posted in the wiki at the end of the section at > > >http://wiki.sagemath.org/interact/calculus > > > The 2D example plots an ellipse and allows display of vectors such as > > velocity, acceleration, unit tangent, unit normal, tangential and > > normal components of acceleration. Scalar speed and curvature are > > also displayed. Editing the definition of the position function > > should allow everything to work correctly, though you need to mess > > with figsize to get an aspect ratio of 1 (so orthogonal vectors really > > look orthogonal). Also re-discovered bug #4465 where zero-length > > arrows don't fail gracefully. > > > The 3D example is similar but includes the binormal vector and uses an > > exponentially-growing helix. I setup computing torsion but it seems > > to take an inordinate amount of time, so it is commented-out. I'd > > imagine I could be more efficient about how functions are defined, or > > the methods I used. For students, I tried to stick to the definitions > > rather than less-intuitive shortcuts. > > > This was all very easy to learn and make happen. Kudos to the folks > > who built the interact framework, the 2D and 3D plotting, and the > > differentiation and vector routines. It'll make Monday's class that > > much nicer. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sage-edu" group. To post to this group, send email to sage-edu@googlegroups.com To unsubscribe from this group, send email to sage-edu+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-edu?hl=en -~----------~----~----~----~------~----~------~--~---
