| Using the C++ Math Library | |
Passing Optional Input Arguments
Some MATLAB functions take optional input and output arguments. tril(), for example, which returns the lower triangular part of a matrix, takes either one or two input arguments. If present, the second input argument, k, indicates which diagonal to use as the upper bound; k=0 indicates the main diagonal and is the default if no k is specified. In interpreted MATLAB you invoke tril() either as
L = tril(X)
L = tril(X, k)
where L, X, and k are matrices. k is a 1-by-1 array.
The MATLAB C++ Math Library contains two versions of the tril() function. The first version takes one argument; the second takes two arguments. The two ways to call the MATLAB C++ Math Library versions of tril() are exactly the same as the two ways you can call tril() in interpreted MATLAB
L = tril(X);
L = tril(X, k);
where L, X and k are mwArray objects.
| | Returning One Result and Passing Only Required Input Arguments | Passing Optional Output Arguments | |