Determine the minimum value excluding zero

          A        B 

         0.025   520
         0.027   531
         0.029   560
         0.031   508
         0.033   000
         0.035   572
         0.037   523
         0.039   512
         0.041   582
         0.043   525

Hi, I am writing a program to determine the value of element A which is corresponding to the minimum value of element B. this value is not equal to zero [excluding zero]. The answer must be as:

M =

0.031

508

However, the written code

[MinB,Idx] = min(E(:,2)); Result = E(Idx,:)

gives this answer

M =

0.033

000

Could you please let me know the right code which is able to display the value of element A which is corresponding to smallest value of element B but it is not equal to zero

Thank you very much

Answer 1

[Andrei Bobrov]

 A= [0.025   520
         0.027   531
         0.029   560
         0.031   508
         0.033   000
         0.035   572
         0.037   523
         0.039   512
         0.041   582
         0.043   525]

ii = A(:,2) > 0;
A2 = A(ii,:);
[M,i2] = min(A2(:,2));
out = [A2(i2,1),M];

[UTS]

Thank you very much