6.2 Class Histogram

Class Histogram allows the easy compilation of distribution statistics. To show how to use this class, here is a brief example which employs the uniform random number generator as a source of random deviates:

#include <rw/histo.h>
#include <rw/rand.h>
#include <iostream.h>

main()
{
  RWTRandUniform<RWRandGenerator> ru;
  // Vector of 100 random points:
  RWMathVec<double> v(100,ru);

  /*
   * Construct a histogram with 10 bins,
   * encompassing the data in v.  
   * This will also initialize the histogram
   * with the data in v.
   */
  Histogram hg(10, v);

// Print the results:
  cout << hg << "\n";
}

Note that the counts in class Histogram are in a public RWMathVec<int> base class; it can be used anywhere an integer vector can be used:

Histogram hg1;
Histogram hg2;

.
. // Fill up hg1 and hg2.
.

// Calculate and print the sum of the two histograms:

cout << hg1 + hg2;