1. Sharing Code on the MATLAB File Exchange April 23, 2006 Ned Gulley The MathWorks, Inc.

2. 1.MATLAB 2.File Exchange 3.Stats 4.Evolution 5.Futures

3. What is MATLAB? A general purpose number-crunching environment A matrix-based language suited for algorithm development

4. What is the File Exchange?

5. Value proposition: Good Free Code Concerns Barriers to participation Cost of maintenance

6. Operating principle: Reward vanity

7. Some numbers 9-11-2001 4439 20 120 10,000 100

8. Evolution Download counters Ratings & comments Author reputation Blog Collaborate with me Peer review: demotion & promotion Code metrics

9. Collaborative networks

11. Code metrics

13. Futures Wiki coding MATLAB SourceForge File Exchange in a Box

14. Thanks! Ned Gulley gulley@mathworks.com http://www.mathworks.com/matlabcentral