how to convert to 3d?

Hai,

I have plotted a hyperbolic lens in matlab using the equation "y=sqrt((n^2-1)*((x-f)^2))+((2)*(f)*(n-1)*(x-f)))". As you can see the equation is in 2d, but I need the lens in 3d, is it possible in matlab? Do you have any equations for lens in 3d?

BSD

[Image Analyst]

What is the other dimension? Assuming n is a constant (index of refraction) and f is a constant (focal length) then y is a function of only x, not x and something else. That is a 1D situation. So what is your second dimension you want to plot? Do you want to plot y as you also change n or f?

[bsd]

I don't have any second dimension, I need to view the lens in 3d, in the form of an hyperboloid.

BSD

[Image Analyst]

Maybe if you say x is really r (radius) and so then you have x and y and then the equation would be z. Then you would have a 2D situation. You could then use meshgrid() and surf(). Can you try that and get back to us?

[bsd]

I did not understand your explanation...

BSD

Answer 1

[Fangjun Jiang]

It's probably not "convert". If you don't have the third dimension, then it is a 2d plot. If you want to view it in 3d, you can use view().

plot(magic(10));
view(3)

Then, click the "rotate 3D" button to rotate and see the effect.

[Fangjun Jiang]

Oh, good, I guessed right! BTW, is your other question "How to rotate" along the same line? You can use view() with different input arguments to rotate the view, as if you use the "rotate 3D" button.

[bsd]

what is BTW?

BSD

[Fangjun Jiang]

By the way, according to http://en.wikipedia.org/wiki/BTW.