compass plot offsetting the origin

I would like to know if there is a way of offsetting the center of a compass plot, so that the vectors don't emanate from the center but rather from another pre-defined position. As I have two sets of data to be displayed on the same plot and sometimes these overlap, leaving one of the vectors completely covered.

Answer 1

[Andrew Newell]

You could make a couple of subplots:

subplot 211
compass(...)
subplot 212
compass(...)

EDIT: However, if you really want them on the same plot, here is an example of how to do it:

% Generate data sets for example
Z1 = eig(randn(20,20));
h1 = compass(Z1);
hold on
Z2 = eig(randn(20,20));
h2 = compass(Z2);

% Offset the second set of data in the x direction
offset = 1;
for ii=1:20
  set(h2(ii),'Color','r') % Change color so you can tell the data sets apart
  x = get(h2(ii),'XData');
  set(h2(ii),'XData',x+offset)
end

[Filipe Ribeiro]

Thanks. You know how can offset in y direction as well?