MATLAB: Displaying Specific Rows with Non-zero values

Question

I created the following code to create variable names for my solution (Zvalues) to an MILP problem. (Zvalues are binary)

[Z1,Z2] = meshgrid(1:i,1:m);

Ztitle = [Z1(:),Z2(:),Zvalues(:)];

fprintf(' Z%d%d %d\n',Ztitle.')

It works pretty fine. When I run it, it gives the following response:

   Z11     0
   Z12     0
   Z13     1
   Z21     0
   Z22     1
   Z23     0
   Z31     0
   Z32     1
   Z33     0

The "Zvalues" column includes answers for my variables. However, I want to only display nonzero values of Zvalues vector. So, for this case, I want to acquire following:

   Z13     1
   Z22     1
   Z32     1

Thanks for any recommendation.

Answer 1

Change your fprintf call to:

fprintf(' Z%d%d %d\n',Ztitle(Ztitle(:,3)~=0,:).')

That should do what you want.