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% plotvectorfield
%
% Plots quiver plot of vector function values at selected points.
% 
%
% Author:  Carlos J. Cela <carlos.cela@utah.edu>
% Version: V1.0, 2012-01-08
% License: Please feel free to use this for anything you need.
%
% Use:
%       plotvectorfield
%
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% Generate mesh in x, y
[x,y] = meshgrid(0:.1:2);

% Define vector field
vx = sqrt(x+y);
vy = sin(y)+x;

% Overlap quiver plot
quiver(x,y,vx,vy,'r','linewidth',3);
axis([0 2 0 2],'square');
grid on
colormap gray;