OK, thanks. I finaly wrote this : accumulator_set<double, features<tag::density> > angular_acc(tag::density::num_bins = Constantes::_pi/16.,tag::density::cache_size = 2.*Constantes::_pi); int nb_ech = (int)( (itb->norme()) / pas ); TPoint2D <double> direction = itb->p1 - itb->p2; direction.normaliser(); // On parcourt tous les échantillons for (unsigned int j=0;j<nb_ech;j++) { TPoint2D <double> pt = itb->p1 + direction * j; double angle = atan2( gy(pt) , gx(pt) ); angular_acc(angle); } Now that I am here, how can I extract the histogram ? Regards Eric Niebler a écrit :
Olivier Tournaire wrote:
Hi all,
I am trying to use boost::accumulators lib and I would appreciate some help. I do not know how to use the tag::density. How do I use :
accumulator_set<double, tag::density > angular_acc;
Have a look at the docs: http://boost-sandbox.sourceforge.net/libs/accumulators/doc/html/index.html
That should be:
accumulator_set<double, features<tag::density> > angular_acc;
and set
density::cache_size density::num_bins
To have for example 10 subdivisions between -pi and pi ? Then, how do I extract the results of the accumulation ?
The docs tell you all this, too.
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.