Recent content by Wesleytf

Aw, no one to help it looks like. For now, I forge on alone!

hello all! I just got a new computer with an Nvidia card, and am now able to do some GPU parallel processing inside mathematica using CUDA. My main interest is in taking tons of moderate accuracy (3-4 digits) numerical integrals. I've been using QMC in MMA and that's been working well...

yes, but if you take that 2-D plot and extend it you'd have a trough, not a spiral. If the particle were sliding down just a slice of that trough, it would become the 2-D problem as described. The solution was just posted and this was the solution...

The solution is actually MUCH easier to find if you rearrange your final equation to something like Cos[theta] theta'' - Sin[theta] theta'^2 = -g/a Sin[theta] Then, look hard at the left hand side and see if you can figure out what it's a derivative of, and then, what THAT is a derivative...

Do you have mathematica? At least that way you could check what you need to get to... I just finished work; hopefully I can make some progress on it after dinner. I'll let you know if I do.

edit: gabba--make a little parametric plot in 2D and you'll get an idea of the problem. It's equivalent to a particle on a cycloid-shaped wired, if I'm not mistaken. Ali-I did it all in theta. Think about it- if your T and your U are in {theta, theta' and t}, you can just use those to make...

NM-Solved(How to plot points from a "Maximize[ ]" output) Hello all, I'm working with some data sets and I want to make a bar-type graph out of the numbers that result after a series of equations ending in a maximize function. My trouble is that the output of the function gives something...

Oh, I forgot to come back and say that you can in fact do an overlay if you define it as a single graphic. I had to install the old animate package to use the "SpinShow" command. g3 = Show[plot1, plot2, plot3] SpinShow[g3]

No worries--you've already helped a ton.

alright, I've got one plot spinning around(thanks so much for that snippet)--is it possible to do an overlay animation?

Is there a way to animate and export a 3D plot such that it rotates about the z axis automatically? A friend is doing a presentation and I'd like to make some animated files of the 3D plots we've been making to include in a power-point. I've looked through help files and some google searches...

Nevermind, I found it! PlotStyle -> Directive[Opacity[0.5]]

Thanks for the help-- I wound up using this for the plane: plane = Plot3D[{1.295*x + .6415*y + 16.09}, {x, -3, 3}, {y, -3, 3} ] I'd like to make add in Opacity[.5], but I'm not sure where to put it in and the Plot3D help file doesn't show it as an option (at least that I can find). Any advice?

I'd like to make a single 3D graph that contains a scatter plot and a plane. Ideally I'd like to import the data for the point from an excel file, but if I have to punch it in, I can find a few hours to kill. Anyway, can anyone help me with the code for this? I can get a 3D scatter plot where...

My objection is not to the truth of the statement that those vectors span the Nul space--in the book, that's exactly what's presented. It's the use of "thus" that is inaccurate. The statement I presented afterwards was just meant to show how the argument that the equivalent statement "because...