[boost] Accumulators accumulators. roc_distribution

From: Niitsuma Hirotaka (hirotaka.niitsuma_at_[hidden])
Date: 2006-12-18 05:23:37

Now I am trying to describe
Boost.accumulators. roc_distribution

To define ROC curve data, we need two p_square_cumulative_distribution
1. cumulative_distribution ture or false potive
2. cumulative_distribution ture or false negative
One of the  cumulative_distribution can be defined by using dependencies

    struct roc_distribution
      : depends_on< p_square_cumulative_distribution >
…

But I can not find way to use two different cumulative_distribution in
single acc class.
How to use two different cumulative_distribution in single acc class
like the following ?

struct roc_distribution_impl...

{
        template<typename Args>
        void operator ()(Args const &args,bool positive_or_negative)
                if(positive_or_negative)
                        positive_p_square_cumulative_distribution …
                else
                        negative_p_square_cumulative_distribution …
…
}