I want to plot the vector field on F=x i+ j

I want to plot the vector field on

$\vec F=x\cap i+\cap j$

Invalid use of operator.

Error in connector.internal.fevalMatlab

Error in connector.internal.fevalJSON

Also how to plot the vector field of F=2*i+j?

How to do that

[x,y] = meshgrid(-3:.15:3,-3:.15:3);
Fx = x;
Fy = 1;
figure;
quiver(x,y,Fx,Fy,'k','linewidth',1)

Answer 1

[Alan Stevens]

Do you mean like this?

[x,y] = meshgrid(-3:.15:3,-3:.15:3);
Fx = x;
Fy = ones(size(y)); %%%%%%%%%%%
figure;
quiver(x,y,Fx,Fy,'k','linewidth',1)

For 2*i + j juat make Fx = 2*ones(size(x)).