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Re: Can you reproduce the 3D graph in the ticalc.org logo?

Tacvek

Umm... i think this is a 3d 'SINC' GRAPH.
If so the graph that uses the WHEN fuction IS EXACTLY correct. This is what the MATLAB 6 Manual has to say about the SINC function
sinc(x)=sin(x)/x
To display in color type this:
[X,Y] = meshgrid(8:.5:8);
R = sqrt(X.^2 + Y.^2) + eps;
% (the eps just prevents sin(0)/0 by adding
% the smallest number your system can handle
Z = sin(R)./R;
mesh(X,Y,Z,'EdgeColor','black')
surf(X,Y,Z)
colormap hsv
colorbar

I tested this, and it looks almost identical to the graph in question. The window size may have to be adjusted slightly though. (i have no clue how to do that)
I hope this helps.
Now what is that graph that is shown on the case of the ti89? (I know it is actually construced with 2 graphs and shading.)

Reply to this comment

9 June 2003, 04:12 GMT


Re: Can you reproduce the 3D graph in the ticalc.org logo?

Paul Joyner

Hmm...
I wonder how many of the people who answered yes actually CAN reproduce the graph. I can't. Don't know how. Don't care how.

Reply to this comment

9 June 2003, 08:02 GMT


Re: Can you reproduce the 3D graph in the ticalc.org logo?

W Hibdon

All this stuff is way too heavy for me. I thought that I was in highlevel math, but I have never seen some of this stuff. I have never graphed 3D, and I have never been over trig  though not that it is not in the curriculum, it is just that my teachers never got to the stuff, and I don't have the work ethic to teach myself. I feel incredibly inferior to just about everyone right  except the guy who didn't know what "e" was. I guess I am not at the bottom just yet, but I am pretty close.
W

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9 June 2003, 20:01 GMT


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