Avoiding (X,Y)=(0,0) from loop

I want to avoid (0,0) value for (X,Y). How can I achive it?

M=64;
r           = linspace(0,1,M);
    theta       = linspace(0,2*pi,M);
    [R, THETA]  = meshgrid(r,theta);
   X           = R.*cos(THETA);
    Y           = R.*sin(THETA);

[KSSV]

You want to avoid in the sense, you want to replace it with some other number or NaN?

[Rahim Islam]

I just want to skip this pair. No replacement is deisired.

[Rahim Islam]

The following will work:

if(x~=0) && (y~=0)

Z=y/x;

else

end

Answer 1

[KSSV]

M=64;
r           = linspace(10^-3,1,M);
theta       = linspace(0,2*pi,M);
[R, THETA]  = meshgrid(r,theta);
X           = R.*cos(THETA);
Y           = R.*sin(THETA);
idx = X==0 & Y == 0 ;

Answer 2

[RAGHUNATHRAJU DASHARATHA]

As per my understanding you want to avoid the value (0,0) for (X,Y) in your code

I will be demonstrating it using your code. I have just made a change to your code for the value X and Y

 M=64;
     r = linspace(0,1, M);
     theta = linspace(0,2*pi, M);
     [R, THETA] = meshgrid(r,theta);
     X = R(:,2: end).*cos(THETA(:,2:end));
    Y = R(:,2:end).*sin(THETA(:,2:end));
        Z =Y./X;