addrefarrow.m

Add a reference arrow to 2D quiver plot

% addrefarrow(h,x,y,u,v)
%
% This is a quick hack to add a scale/reference arrow at a desired position
% given by the input argument (x,y). The scale arrow length in the x
% direction is given by u, in the y direction by v.
%
% WARNING, this function modifies the data contained in the quiver graphics
% group handle h!