Determine the minimum value excluding zero

Question

UTS 2015-3-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/182344-determine-the-minimum-value-excluding-zero

评论： UTS 2015-3-10

          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

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Answer 1

Andrei Bobrov 2015-3-10

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/182344-determine-the-minimum-value-excluding-zero#answer_170705

在 MATLAB Online 中打开

 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];