Add a slider to function in matlab

Hey guys,

So I'm pretty new to programming GUIs and I had a question regarding how to add a slider to my function.

So the function I have is called rotationmatrix where the program rotates a 2D plot about the origin and saves the new x and y values for the rotated plot. I want to put a slider in to be able to change the angle of rotation on the plot without having to constantly input the angle into the M-file. I would also want the plot to change in real time as I move the slider. Could someone tell me how to do this? I really need your guys help!

Answer 1

[Sean de Wolski]

Why not just use rotate3d on?

rotate3d on

Now you can move it with the mouse. If you're building it in GUIDE then add this button on the toolbar editor:

tools -> toolbar editor -> double click the rotation one

Answer 2

[Zachary Tochka]

I want to be able to save the rotated x-y coordinates to do some manipulation on the new x-y dataset so I don't think rotate3d would save the x,y variables, it would only save the figure.

[Sean de Wolski]

Huh? Even if you save the figure, the x and y data will be saved as proeprties of the line.

Also, you can query x limits, y limits, and view azimuth and elevation using:

doc xlim
doc ylim
doc view

For example to get the view after rotating:

[az,el] = view

Answer 3

[Zachary Tochka]

I don't understand. Say I have a data set where x = [1 2 3] and y = [4 4 4]. Then I want to rotate the figure 90 degrees to the right so that x becomes [4 4 4] and y becomes [1 2 3]. How do I save the figure so that I get the new x,y coordinates that have x =[4 4 4] and y =[1 2 3]?

When I mean save the figure I mean that I want to save the x,y variables to their new values.

[Sean de Wolski]

But the values aren't changing! Just the way you're viewing them. Which is why it would be better to store the viewing angle.

[Sean de Wolski]

Otherwise you're going to need to calculate how the angle has changed and prioject your original x/y data into this new position. I think there is probably a better approach to do what you are trying to do.

What is the big picture?