Jiro Doke

Christian,

I think I know what's going on. When you create an App, MATLAB checks to see if your function has an output argument or not. If it does, it will call "imagine" with an output argument. I see that in your code, you disable the ability to change the number of axes when "nargout" is 1.

Just as a note: as you can see from the documentation for Apps (the Tips section)

http://www.mathworks.com/help/matlab/creating_guis/app-creation.html

MATLAB assumes that the output from your function is a figure handle, and that's how it detects whether the figure has closed or not.

A fix would be to use a slightly different version of "imagine" for the App version, and not disable the multi-axes option. You can also output the handle of the figure, as opposed to the handle of the axes.

@Wolfgang,

Thanks for pointing this out. It was a bug. I'll fix it and resubmit. In the meantime, please replace the following lines in my code:

addParamValue(p, 'LineStyle', '-' , @(x) validatestring(x, ...
{'-', '--', '-.', ':'}));

to:

addParamValue(p, 'LineStyle', '-' , @(x) ischar(validatestring(x, ...
{'-', '--', '-.', ':'})));

in the find ball script i get error on the 52 line that is after the else, kindly answer this. I am using R2009a version

%% Find center
% Now we are using REGIONPROPS to extract the centroid of the group of
% pixels representing the ball.
s = regionprops(ball1, {'centroid','area'});
if isempty(s)
error('No ball found!');
else
[~, id] = max([s.Area]);
hold on, plot(s(id).Centroid(1),s(id).Centroid(2),'wp','MarkerSize',20,'MarkerFaceColor','r'), hold off
disp(['Center location is (',num2str(s(id).Centroid(1),4),', ',num2str(s(id).Centroid(2),4),')'])
end

thanks Jiro, great tool. If you find the time, why don't you go and put in a way to select a continuous color (a line) for instance. This would make clicking along a closed plot unecessary. What do you think ;)

this is an amazing toolbox...
but how can we define the colour of the curve, the shape of curve like 'b-', etc...
or
how to include another graphic option?