ｖ７７６６ｐｐ - 経済統計練習帳

package math;
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
import org.apache.commons.math3.stat.correlation.Covariance;
import org.apache.commons.math3.linear.*;
 
 
class pro{
 
    double[][] data=new double[101][2];
 
public static void main(String[] args) {
 
pro test=new pro();
}
 
pro(){
 
    int s;
 
for(s=0;s<101;s++){    
data[s][0]=100+Math.random();
data[s][1]=200+Math.random();
}   
 
 
    Covariance c=new Covariance(data);
 
 
 
RealMatrix v=c.getCovarianceMatrix();
 
System.out.println(v.getEntry(0,1));    
System.out.println(v.getEntry(1,0));   
 
 
 
}
}