1 #ifndef __HISTOGRAM__H_

     2 #define __HISTOGRAM__H_

     3 class Histogram

     4 {

     5 	double mean;

     6 	double variance;

     7 	double std_dev;

     8 

     9 	int rows;

    10 

    11 	void calc_mean();

    12 	void calc_variance();

    13 	void calc_std_dev();

    14 

    15 public:

    16 	int *weights;

    17 

    18 	Histogram(int numrows);

    19 	~Histogram();

    20 

    21 	void calcStatistics();

    22 

    23 	float get_std_dev() { return std_dev;};

    24 	float get_variance() { return variance;};

    25 	float get_mean() { return mean;};

    26 };

    27 

    28 #endif