How to divide an wav file into segments

[AK2]

Does anybody know how to do this in matlab?

 

[MATLABdude]

According to the MATLAB documentation, MATLAB imports mono sound as an m x 1 and stereo as m x 2, where m is the total number of samples in the file:
http://www.mathworks.com/help/techdoc/import_export/f5-132080.html#bsdufi0

Based on that information, you should be able to chop these up into shorter segments, and then re-save the resultant shorter segments using wavwrite:
http://www.mathworks.com/help/techdoc/ref/wavwrite.html