How to pass a vector to the constructor of a thrust-based odeint observer, such that it can be read within the functor

Question

I am extending the parameter study example from boost\'s odeint used with thrust, and I do not know how to pass a vector of values to the constructor of the observer, such t

Answer 1

You can pass a thrust vector to the functor, but you can not easily store it here. But you can store the underlying raw pointer form this vector:

struct minPerturbFunctor
{
    state_type::value_type* m_ptr;
    size_t m_len;
    minPerturbFunctor( state_type const& x )
    : m_ptr( thrust::raw_pointer_cast(&x[0]) )
    , m_len( x.size() )
    { }

    template< class T >
    __host__ __device__
    void operator()( T t ) const
    {
        // now you can access m_ptr like m_ptr[i] 
    }
};

This is pretty much the suggestion from Robert Crovella.