# Find row in a matrix A corresponding to the row another matrix B

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Ricardo Gutierrez on 9 Jul 2018
Good Morning.
I hope you are well and also I hope you help me with your advice to find the solution.
I have an A matrix of 6 X 10 as an example:
-1.3726 -0.7760 -0.6715 -0.2796 -0.1499 0.1499 0.2796 0.6715 0.7760 1.3726
-1.3726 -0.7760 -0.6715 -0.1796 -0.0499 0.0499 0.1796 0.6715 0.7760 1.3726
-1.3726 -0.7760 -0.7715 -0.2796 -0.0499 0.0499 0.2796 0.7715 0.7760 1.3726
-1.3726 -0.7760 -0.6715 -0.2796 -0.0499 0.0499 0.2796 0.6715 0.7760 1.3726
-1.3726 -0.8760 -0.6715 -0.2796 -0.0499 0.0499 0.2796 0.6715 0.8760 1.3726
-1.4726 -0.7760 -0.6715 -0.2796 -0.0499 0.0499 0.2796 0.6715 0.7760 1.4726
Each row is taken for a certain operation resulting in a matrix B_ 6 X 1:
B=[13.01; 13.14; 16.60; 20.05; 13.74; 12.48]
The first row of matrix A produces the first row of matrix B
The second row of matrix A produces the second row of matrix B and so on
The problem is that through Matlab code identify the maximum value and the posicon of vector B and know what elements of the row and position of that line of matrix A corresponds to it.
In this case it is visually known that the maximum in B is 20.05 and that it occupies the 4th row of the same matrix and therefore corresponds to the fourth row of matrix A with elements that are in that row, that is: -1.3726 -0.7760 -0.6715 -0.2796 -0.0499 0.0499 0.2796 0.6715 0.7760 1.3726
That's what I want to know: value and position of the maximum of B and position and values of the elements of vector A that produced that maximum value in B
I hope you have understood me and I am waiting for your help. Thank you.

Paolo on 9 Jul 2018
Edited: Paolo on 9 Jul 2018
If I am understanding the question correctly the answer is simply:
>>C = A(B==max(B),:)
C = Columns 1 through 7
-1.3726 -0.7760 -0.6715 -0.2796 -0.0499 0.0499 0.2796
Columns 8 through 10
0.6715 0.7760 1.3726

### More Answers (1)

Ricardo Gutierrez on 9 Jul 2018
Paolo Excellent you are a genius, thank you very much

R2014a

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