找到最大值matlab的所有索引

Question

I just want to find all the indices of the maximum value in a vector in matlab. the max function returns only the index of the first occurence of the maximum. For example:

maxChaqueCell = [4     5     5     4]
[maximum, indicesDesMax] = max(maxChaqueCell)
 maximum =

         5
 indicesDesMax =

         2

I need the indicesDesMax to have 2 and 3 which are the indices of the two 5 we have in maxChaqueCell , how can I do that?

Thanks.

Answer 1

First you find the max value, then you find all the elements equal to that:

m = max(myArray);
maxIndex = find(myArray == m);

Or using your variable names:

maxChaqueCell = [4 5 5 4];
maximum = max(maxChaqueCell)
indicesDesMax = find( maxChaqueCell == maximum );

This is how you find all of them, not just the first one.

Answer 2

[value,index] = sort(maxChaqueCell,'descend');

sortedmaximums = [value,index];