Return matrix of maximum values

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Manu Mensa
Manu Mensa 2019-2-20
评论： Manu Mensa 2019-2-21
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.

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采纳的回答

madhan ravi
madhan ravi 2019-2-20
x(I)
y(I)
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Stephen23
Stephen23 2019-2-21
编辑：Stephen23 2019-2-21
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
Manu Mensa 2019-2-21
Thank you all very much. It worked.

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更多回答（1 个）

Jos (10584)
Jos (10584) 2019-2-20
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

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