src/test/scripts/functions/parfor/parfor_optimizer1b.dml

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V = read($1,rows=$2,cols=$3);
m = $2;
n = $3;
W = m;

R = matrix(0, rows=n,cols=n); 
dummy = matrix(1, rows=1, cols=1);

parfor( i in 1:(n-1), opt=HEURISTIC )
{
   X = V[,i];                 
   m2X = moment(X,2);
   sigmaX = sqrt(m2X * (W/(W-1.0)) );
      
   parfor( j in (i+1):n )  
   {  
      Y = V[,j];

      #corr computation    
      m2Y = moment(Y,2);
      sigmaY = sqrt(m2Y * (W/(W-1.0)) );      
      covXY = cov(X,Y);      
      rXY = covXY / (sigmaX*sigmaY); 
      
      #print("R[("+i+","+j+")]="+rXY); 
      R[i,j] = dummy * rXY; 
      
   }
}   

write(R, $4);