Subtract the mean from every data point : transform « STL Algorithms Modifying sequence operations « C++

1. C++
2. STL Algorithms Modifying sequence operations
3. transform

Subtract the mean from every data point

  
#include <algorithm>
#include <cmath>
#include <functional>
#include <iostream>
#include <list>
#include <numeric>
#include <vector>

using namespace std;

template <class T>
void print(T& c){
   for( typename T::iterator i = c.begin(); i != c.end(); i++ ){
      std::cout << *i << endl;
   }
}

int main(){
   const float a[] = { 1, 1.3, 1.5, 0.9, 0.1, 0.2};

   vector<float> data( a,a + sizeof( a ) / sizeof( a[0] ) );

   cout << data.size() << " ELEMENTS\n";
   print( data  );

   // compute the mean
   float mean = accumulate( data.begin(), data.end(), 0.0f )/ data.size();

   // subtract the mean from every data point
   vector<float> zero_mean( data );
   transform( zero_mean.begin(), zero_mean.end(), zero_mean.begin(),bind2nd( minus<float>(), mean ) );
   print( zero_mean );
}
  
    
  

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