..
   Generated automatically by cpp2rst

.. highlight:: c
.. role:: red
.. role:: green
.. role:: param


.. _triqs__stat__accumulator__n_log_bins:

triqs::stat::accumulator::n_log_bins
====================================

*#include <triqs/stat/accumulator.hpp>*



**Synopsis**

 .. rst-class:: cppsynopsis

       | int :red:`n_log_bins` () const





Returns the number of bins currently in the logarithmic part of the accumulator
When the accumulator is active (n_log_bins_max != 0), there is always at least one zeroed bin even if no data has been passed to the accumulator.





Returns
^^^^^^^

Number of bins

Example
^^^^^^^

..
   Included automatically from /src/triqs/doc/documentation/examples/triqs/stat/acc_nlogbin.cpp

.. code-block:: cpp

    #include <triqs/stat/accumulator.hpp>
    #include <iostream>

    using namespace triqs::stat;

    int main() {
      // Accumulating a simple scalar
      // Defines log bin with maxmimum of 4
      accumulator<double> my_acc(0.0, 4, 0, 1);

      // Always at least one bin for an active accumulatotr
      std::cout << "A. Number of Bins: " << my_acc.n_log_bins() << std::endl;

      my_acc << 0.0 << 1.0 << 2.0 << 3.0 << 4.0;

      // Now there are three bins of binning capacity 2^0, 2^1, 2^2
      std::cout << "B. Number of Bins: " << my_acc.n_log_bins() << std::endl;

      my_acc << 5.0 << 6.0 << 7.0 << 8.0;

      // Another bin was created since there is a full 2^3 number of samples
      std::cout << "C. Number of Bins: " << my_acc.n_log_bins() << std::endl;

      // Further adding data will continue to accumulate with the current bin sizes,
      // but no new bins will be added as we have reached my_acc.n_log_bins_max() == 4.

      // ******************

      // accumulator with log binning turned off
      accumulator<double> my_acc_no_log(0.0, 0, 1, 1);

      std::cout << "D. Number of Bins: " << my_acc_no_log.n_log_bins() << std::endl;

    }


*Output*

.. code-block:: text

    A. Number of Bins: 1
    B. Number of Bins: 3
    C. Number of Bins: 4
    D. Number of Bins: 0