Displays Nan in correlation result

I am finding the correlation between the generated random variable but the result is nan, can you please help me

clear all;
clc;
N = 1000;
       % standard normal distribution mean=0 and variance =1
norm_mean=0;
norm_var=1;
      %generating random variable with standard normal distribution
r1= norm_mean+sqrt(norm_var)*randn(1,N);
r2= norm_mean+sqrt(norm_var)*randn(1,N);
      %normal distribution PDF
xPDF= normpdf(r1,norm_mean,sqrt(norm_var));
yPDF =normpdf(r2,norm_mean,sqrt(norm_var));
      %calculate normal distribution cdf
pd = makedist('Normal',norm_mean,sqrt(norm_var));
      %compute the cdf values for the standard normal distribution at the values
     %in random variables
y1 = cdf(pd,r1);
y2 = cdf(pd,r2);
   %calculating  correlation
rho= corr(r1,r2); 

[Nirajan Khatri]

and i am trying to compute gaussian copula

Answer 1

[Ameer Hamza]

r1 and r2 shoule be column vectors in your case

rho= corr(r1(:),r2(:)); 

[Nirajan Khatri]

is it

rho= corr(y1(:),y2(:));

or

rho= corr(r1(:),r2(:));

[Ameer Hamza]

Both are correct syntax. You need to decide which one to use for this problem.