Inheriting matrix_array

12 Sep 2005

      Dear all,

I am evaluating aspects of the boost library.  I wish to generate a simple 
implementation of ray transfer (ABCD) matricies,

http://en.wikipedia.org/wiki/ABCD_matrix

Since these matricies are 2x2 and will need multiplication, trace and other 
similar matrix like operations it makes sense to use:

matrix_array<double,2>

or 

boost::numeric::ublas::matrix_scalar<double>

I wish to generate a ray transfer matrix class by overloading (say) 
matrix_array<double,2> and adding member functions such as:

class rtm : boost::multi_array<double,2> {
public:
	void setA(double val) { 
		boost::multi_array<double,2>::operator()(0,0) = val; 
	}
};

Now, this is wrong...  Essentially I just want to know something very 
simple....

When I inherit multi_array or any other class that I want to use the [] or 
(x,x) notation to access elements (subscript operators) how on earth do I do 
it?

Your help will be greatly appreciated, this is driving me crazy!

-ed

Edward Grace