If you have used MATLAB to make graphics images before, then you will be glad to know that it isn't too hard to make an animation, by stringing a series of related pictures together.
Of course, you need to have a series of images that do make a sensible sequence, you need to make sure that the individual images use the same picture size, plot scale, color bars and so on. Of things to worry about include figuring out what kind of movie file you want to create. But let's get on to the fun part!
Marcus Garvie has provided examples, based on a Linux version of MATLAB (and believe me, when it comes to graphics, the Linux/Unix/Macintosh version of MATLAB is still a bit flakey and buggy, so it's good to have an example that works.) To examine his information, go to Creating AVI Movies in MATLAB.
You can go up one level to the MATLAB source codes.