C++ program to perform data transformation Min-max and Z score Normalization

Simple C++ program to perform data transformation using min-max normalization, z-score normalization and decimal scaling operation.

Code:

#include<iostream>

#include<math.h>

using namespace std;

int main()

{

int n;

double sum=0;

cout<<"Enter The Number of values:";

cin>>n;

int a[n],r1,r2;

for(int i=0;i<n;i++)

{

cin>>a[i];

}

cout<<"Enter starting and ending range for normalization:";

cin>>r1>>r2;



double max = a[0];

int min = a[0];



for (int i = 0; i <n; i++)

{

if (a[i] > max)

{

max = a[i];

}

else if (a[i] < min)

{

min = a[i];

}

}

float v[n];double temp;

for(int i=0;i<n;i++)

{

temp=double(double(double(a[i]-min)*(r2-r1))/(max-min))+ r1;

v[i]=temp;

}

cout<<"normalization by Min-max"<<endl;

cout<<"Values are:"<<endl;

for(int i=0;i<n;i++)

{

cout<<v[i]<<endl;

}



cout<<"normalization by Z-score"<<endl;

double mean;

for(int i=0;i<n;i++)

{

sum=sum+a[i];

}

mean=(sum/n);double temp1=0,std_dev1;

for(int i=0;i<n;i++)

{

temp1=temp1+pow(a[i]-mean,2);

}

std_dev1=sqrt(temp1/n);

for(int i=0;i<n;i++)

{

temp=double(a[i]-mean)/std_dev1;

v[i]=temp;

}

cout<<"Values are:"<<endl;

for(int i=0;i<n;i++)

{

cout<<v[i]<<endl;

}

int j=0;



cout<<"normalization by decimal scaling"<<endl;

while(max>1)

{

max=max/10;

j=j+1;



}

for(int i=0;i<n;i++)

{

temp=a[i]/pow(10,j);

v[i]=temp;

}

cout<<"Values are:"<<endl;

for(int i=0;i<n;i++)

{

cout<<v[i]<<endl;

}

return 0;

}