Yair Altman

This is an extremely important utility. Too bad it's not part of the standard Matlab language.

It is enormously useful for data persistence (saving) performance, especially for class objects that would otherwise require the slow save('-v7') or the even slower save('-v7.3') - using this utility, we can easily save using the much faster save('-v6'). On my system, the run-time and file-size of saving non-numeric data were reduced by 1-3 orders of magnitude! The interesting part is that the performance and file-size improvements were across-the-board, using any supported option for saving the data (save -v6/-v7/-v7.3 or the savefast utility on FEX).

This utility could be improved for saving Java objects, by checking (using a simple try-catch) whether the object implements a writeObject() method into a ByteArrayOutputStream. See http://docs.oracle.com/javase/6/docs/api/java/io/Serializable.html for more details.

Sébastien - you are using cprintf incorrectly. Firstly, the extra parameter 4 has no meaning since you are not using any printf fields (e.g. %d) in your string.

Secondly, you don't need (and actually should not use) \r - \r clears the current line to the beginning on some systems, which could explain what you are seeing.

@Georgios - the control must be visible for findjobj to work. You can make the figure visible in the OpenFcn using the commands
set(hObject,'Visible','on'); drawnow;

If you don't want the figure to physically appear onscreen, you can set its position to [-300,-300,200,200] or some other off-screen location. The figure will become visible but hidden... You can later move it to your screen center in the OutputFcn.

It's cool!