How do I gain indices of max values in 2D matrix?

For a 16 x 12 matrix I should sort it in descending order to gain the max values (like 10 in total). After that, I should find what was the indices of those max values before sorting .

I tried several times with sort and find. But it doesn't give me correct result.

[Azzi Abdelmalek]

You have two columns, you have to precise how you want to sort them

[Azzi Abdelmalek]

You have a 16x12 matrix, there are several ways to sort your matrix, by rows or by columns? you have to give more details, or just show the result for a short example, if

A=[1 2;3  4;0 1;4 5 ;100  20;2 2;0 7]

What should be the result?

Answer 1

[Walter Roberson]

[sorted, idx] = sort(YourMatrix, 'rows', 'descend');
tenmax = idx(1:10);

[Klara]

Thanks but it gives me the indices of the max values, AFTER sorting!

[Walter Roberson]

[sorted, idx] = sortrows(YourMatrix, -(1:size(YourMatrix,2)));
tenmax = idx(1:10);

this will give you the indices of the original rows that got sorted to the corresponding row position.

Answer 2

[Gautam]

The answer above gives you the indices of before sorting. Try this example.

    A = [1 4; 6 2; 4 2; 7 3]
    [sortedMat,sortedIndex] = sort(A,'descend')

The sortedIndex matrix gives indices of the original rows (Note here that each column is sorted independently)

Answer 3

[Jos (10584)]

Why sort first?

A = [1 4; 6 2; 4 2; 7 3]

[maxValues, RowIndex] = max(A,[],1)
LinearIndex = sub2ind(size(A),RowIndex, 1:size(A,2))

sortedA = sort(A,1,'descend')