MATLAB: Finding index of min value in a matrix

matrix

Hello
I have a matrix and I want to compare three element of this matrix and find min between them and then I want to know the column number of min element.
Could you help me ?
thanks

Best Answer

So, you know what elements of the matrix you want to check?
If that is so, then let's say the row and column of those three elements are defined as:
rowIdx=[r1,r2,r3];
colIdx=[c1,c2,c3];
mat3Elements=myMatrix(sub2ind(size(myMatrix),rowIdx,colIdx);
[minValue,minIdx]=min(mat3Elements);
disp(['Min values is: ' num2str(minValue)])
disp('column: ')
disp(colIdx(minIdx))
if you want the min value of the entire matrix that is easier
[minValue,minIdx]=min(myMatrix(:));
disp(['Min values is: ' num2str(minValue)])
disp('column: ')
[~,col]=ind2sub(size(myMatrix),minIdx);
disp(col)
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