Plot 2D vector in AppDesigner

Hello there!

I'd like to use the command vplot in MATLAB AppDesigner, but it doesn't work.

Is it possible to use it? or is there any other option to plot a vector in 2D in AppDesigner?

Answer 1

[Austin M. Weber]

I could not get the vplot function to work, but there is always quiver.

For instance, if you add a button to your app and give it a callback function you can give it the following commands:

load wind
quiver(app.UIAxes,x(:,:,7),y(:,:,7),u(:,:,7),v(:,:,7));
ylim(app.UIAxes,[30 50])
xlim(app.UIAxes,[85 115])

This will produce a nice 2D vector plot in the app designer (assuming that you already have a UIAxes pane with the name UIAxes in the app):

[Alberto]

Is quiver useful to plot a single vector instead of a vector field?

[Austin M. Weber]

You can certainly do that. Just specify the x and y coordinate where you want the vector arrow to start, then specify the magnitude of the vector in the u (horizontal) and v (vertical) directions. For example:

x = 0;
y = 0;
u = 1;
v = 2;
q = quiver(x,y,u,v,'r','LineWidth',2); % In the App Designer: quiver(app.UIAxes,...)
xlim([-3 3]) % In the App Designer: xlim(app.UIAxes,[-3 3])
ylim([-3 3]) % In the App Designer: ylim(app.UIAxes,[-3 3])

[Alberto]

Thanks a lot, sir! Really useful

[Austin M. Weber]

@Alberto Happy to help! If the solution is working for you then you should click the green button to accept the answer.