To run the matlab simulations you must first builds the necessary mex files.
To compile Dubins Curve Mex by changing into the lib/DubinsPlot directory,
and running:
mex src/dubins.cpp
This will create a dubins.mex file, eg. dubins.mexw64 on Windows 7 64-bit, which is used for plot continuous Dubins vehicle trajcetories in figures.