3D sinc graph

[systems_eng]

I'm trying to graph a sinc function on a 3D graph (surface, plot, or parametric).  So far, I've looked at a bunch of the tutorials regarding 3D graphs and haven't had much luck applying those examples to my case.

My only other idea is to rotate a single sinc function around the  z-axis, but I'm not even sure how to go about doing that.  Does anyone have any ideas how I might do this?  Attached is an image of what I'm trying to generate.

[falkpl]

Attached is an example of a 3d sin(X)sin(Y) plot.

Paul

[agill]

I'm not sure if this is helpful, but...

In MATLAB, I can generate the 3D sinc function using this:

[X,Y] = meshgrid(-8:.5:8);
R = sqrt(X.^2 + Y.^2);

Z = sin(R)./R;

mesh(X,Y,Z)

 The R parameter basically acomplishes rotation around the Z-axis (a circle, if you will).  You use ".^" as you need pointwise exponentiation (just a quirk in MATLAB).

The bold lines are the lines that are most important.  The mesh function just generates the plot.

As for 3d graphs in LV, I'm at a loss, as I'm not too experienced with it in LV.  I just wanted to give you a clue on how to accomplish rotation.

I hope my post helps.

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@falkpl wrote:

Attached is an example of a 3d sin(X)sin(Y) plot.

Paul

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I don't think that acomplishes the "sinc" function.  sinc(x) = sin(x)/x in most cases.

Message Edited by agill on 07-20-2006 09:18 AM

Message Edited by agill on 07-20-2006 09:19 AM

[altenbach]

Try this (LabVIEW 7.0)

Message Edited by altenbach on 07-20-2006 09:55 AM

[systems_eng]

wow.  talking about hitting the nail on the head.  this is awesome.  good job.

[falkpl]

I know that the sinc is different than sin but I had about 2 minuted to get the example out.  Sorry