Quiver Plot from matrices

I have a problem making a arrow-like plot from 2 matrices.

Suppose I have 2 matrices, each filled with zeros, except for at certain positions. like the below:

xComponent = zeros(5,5)
xComponent(3,3) = 1

yComponent = zeros(5,5)
yComponent(3,3) = 2

I now have 2 matrices, one containing the x-component of the "arrow" that I want plotted, and the other containing the y-component. What I was for is to make a "plot" of the 5x5 grid, with an arrow, originating in the point (3,3), with an x-component of 1 and y-component of 2.

The below is a crude image, portraying what I am trying to accomplish.

I have much larger matrices with much more values, but I feel confident that I can make it work on a large scale, if I can just make it work with this.

I do NOT want to explicitly give quiver() the values it needs, I want to somehow generalize it, so that quiver(), or a function like it, can grab the values directly from the matrices and make an arrow-plot.

Thanks!

Answer 1

[Cris LaPierre]

What do you mean by not wanting to give quiver the values it needs? Not sure how you would create the plot without doing that. Here's how I would recreate your plot.

xComponent = zeros(5,5);
xComponent(3,3) = 1;
yComponent = zeros(5,5);
yComponent(3,3) = 2;

[Y,X]=meshgrid(1:size(xComponent,1),1:size(xComponent,2));

figure
plot(X,Y,'k.','MarkerSize',10)
hold on
quiver(X,Y,yComponent,-xComponent,2)

[Franciszek Aniol]

I think the person meant that instead of writing this:

quiver(X,Y,yComponent,-xComponent,2)

the option would be

M = [X,Y,yComponent,-xComponent,2]

quiver(M)

It's just an assumption that this was meant under "not wanting to give quiver the values it needs".