how can I speed up my program??

It is attached as a text file

[Image Analyst]

Either attach your m-file, or read this: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup (or both!)

[Cedric]

Seems to be the follow-up of this thread. Your code still doesn't work and you should experiment with the profiler, as advised in your previous thread.