Return matrix of maximum values

I have a matrix of the form:

a =

17 24 1 8 15

23 5 7 14 16

4 6 13 20 22

10 12 19 21 3

11 18 25 2 9

column 1 & 2 represent x,y positions while col 3-5 represent intensity. I obtained the maximum and index of the intensity for each position from [M,I] =max(a(:,3:5),[],1). I am struggling with how to obtain the x,y positions corresponding to each maximum intensity. Any help would be appreciated. Thanks.

[madhan ravi]

explicitly write your desired output

[Manu Mensa]

Thank you very much.

Answer 1

[madhan ravi]

x(I)
y(I)

[Manu Mensa]

Sorry about this, i tried this but i only get one dimension position values. I require the output to be the x,y positions corresponding to the maximum values of the intensity. i.e output should be of the form:

11 18

10 12

4 6

[madhan ravi]

x=a(:,1);
y=b(:,2);
Result=[x(I) y(I)]

[Stephen23]

Or without intermediate variables:

>> [M,I] = max(a(:,3:5),[],1);
>> XY = [a(I,1),a(I,2)]
XY =
   11   18
   10   12
    4    6

[Manu Mensa]

Thank you all very much. It worked.

Answer 2

[Jos (10584)]

maxxy = zeros(3, 2) ; % pre-allocation
for k = 1:3
    [~, r] = max(M(:, k+2)) ; % row of maximum value in column k
    maxxy(k, :) = M(r, [1 2]) ;
end

[Manu Mensa]

Thank youy very much.