Plotting a 2D vector field with a 3D matrix quiver -MATLAB

Question

I am having real trouble with vectors/matrices etc. in matlab.

I have a 3D vector nxmx2 where n is my x-coordinate, m is my y-coordinate and for each (x,y) there are two z values, the first being my velocity in the x-direction, and the second being my velocity in the y-direction.

How do I plot these velocity functions on a xy graph? I have been trying with things like:

quiver(A)
quiver(A,A,A(:,:,1),A(:,:,2))

But can't seem to get it to work.

Answer 1

The correct way to use quiver for the input you describe is

quiver(A(:,:,1), A(:,:,2));

If you want the axes of the plot to have equal-spaced values different than 1,2,... you should use meshgrid to generate them, as shown in the examples in the quiver documentation.