initialize¶

Initialization After Constructor¶

Syntax¶

size_map = mixed_object . initialize ( fixed_vec , random_vec )

Public¶

This cppad_mixed base_class member function is public.

Purpose¶

Some of the cppad_mixed initialization requires calling the derived class version of the ran_likelihood function. Hence this initialization cannot be done until after the derived constructor completes.

mixed_object¶

We use mixed_object to denote an object of a class that is derived from the cppad_mixed base class.

fixed_vec¶

This argument has prototype

const CppAD::vector<double>& fixed_vec

It specifies the value of the fixed effects vector \(\theta\) at which certain CppAD::ADFun objects are recorded.

random_vec¶

This argument has prototype

const CppAD::vector<double>& random_vec

It specifies the value of the random effects vector \(u\) at which certain CppAD::ADFun objects are recorded.

size_map¶

The return value has prototype

std::map<std::string , size_t> size_map

It represent the size of certain aspects of the problem.

n_fixed¶

the number of fixed effects.

n_random¶

the number of fixed effects.

quasi_fixed¶

If this is one (zero) are a using a quasi-Newton (Newton) method for optimizing the fixed effects.

A_nr¶

is the number of rows in the liner constraint matrix A (the matrix has n_fixed columns).

A_nnz¶

is the number of non-zeros in the liner constraint matrix A.

ran_like_fun.size_var¶

is the number of variables in the algorithm that maps the fixed and random effects to the part of the likelihood that depend on the random effects.

fix_like_fun.size_var¶

is the number of variables in the algorithm that maps the fixed effects to the part of the likelihood that does not depend on the random effects.

Other Fields¶

Not all the fields in size_map are specified, but they can be inspected. For example,

        std::map<std::string , size_t>::iterator itr ;
        for ( itr = size_map . begin (); itr != size_map . end (); itr ++)
                std::cout << itr->first << “ = “ << itr->second << “\ n “;

Example¶

The file derived_ctor.cpp contains an example of using initialize .