how to find matrix indices

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sowndharya 2013-3-8

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k=1:2; t=1:2; x(k,t)=[1.2 1.3;1.8 1.5] max(x) I have entered input x and found max(x).For what value of k and t , x is maximum ?How to find this using matlab code?

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Answer 1

Wayne King 2013-3-8

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编辑：Wayne King 2013-3-8

在 MATLAB Online 中打开

Do you want the single biggest element in the matrix? If so then, just max() will not give you that. You'll get a row vector of the largest elements in each column.

    X = [1.2 1.3;1.8 1.5];
    [val,idx] = max(X(:));
    [I,J] = ind2sub(size(X),idx);
X(I,J)

is the largest element.

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sowndharya 2013-3-14

I want max value in every column so i have used max command .That was helpful.but i want to find the next maximum value in all the columns.This process have to be repeated till finding the least value in that column.i mean in descending order.for ex x=[1 2 3;4 5 6;7 8 9] max(x) will give (1 4 7) [x,y]=max(x) y gives (1 1 1) (indices)

next i have to find next max (2,5,8) the indices i should get (2 2 2) what command i should use?

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