extracting a row from a matrix

Question

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I want to extract a row from a matrix for which the last column element is largest. for example if my matrix is

1 2 3

1 1 4

2 1 2

3 2 5

my answer would be the last row 3 2 5 because 5 is the largest element in the last column. How do I do this please help.

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Answer 1

Jan 2013-12-12

0 个投票

M = [1,2,3;1,1,4;2,1,2;3,2,5];
[~, max_idx] = max( M(:,end) ); 
max_row = M(max_idx,:);

Mahi Nazir 2013-12-12

Thanks! I did the same too.... was a little late in posting though.... Will accept your answer though :) cheers!

Answer 2

Mahi Nazir 2013-12-12

编辑：Mahi Nazir 2013-12-12

0 个投票

I think I solved it, if my matrix is A

[C,I]=max(A(:,3)) %it will find the max in the last column and its index

row=A(I,:)