MATLAB: Quiver Plot only shows vertical vectors

Question

Code:

[x,y] = meshgrid(-10:1:10,-10:1:10);

dx = 1;

dy = y*(3-(x*y));

r = ( dx.^2 + dy.^2 ).^0.5;

u = dx./r;

v = dy./r;

figure

quiver(x,y,u,v);

Problem:

My quiver plot is only showing vertical vectors.

I have tried making the x variable dynamic, which just leads to a messed up graph.

I do not know why my code is wrong…

Answer 1

[x,y] = meshgrid(-10:1:10,-10:1:10);
dx = 1;
dy = y.*(3-(x.*y));  % Element by element multiplication 
r = ( dx.^2 + dy.^2 ).^0.5;
u = dx./r;
v = dy./r;
figure
quiver(x,y,u,v);