I do a lot of seminars and talk to a lot of people about what they are trying to do in MATLAB. One of the more common questions is how to get a surface plot from their data when the data is not on a regular grid. Zain, here at the MathWorks, has apparently answered this question a few times himself, so he wrote a white paper
Notice also that Zain used MATLAB Publishing to create this document. If you have not tried this before, you should install MATLAB Release 14 and try out this new capability. How great is it to write your code using a specialized commenting format and get nice worksheet views of your code at the end for no additional work?