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Find index in 3D matrix for maximum value

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Sharif Khalil
Sharif Khalil 2018-7-17
评论： Sharif Khalil 2018-7-17
I have a 3D matrix 40X181X361, I want to find the index for the maximum value for each of the 40. Pp_loc gives me the 40 maximum values, I would like to find their indicies.
if true
% code
end
Xp = 10:50:2*Km;
Yp = 1*Km;
rho_p = sqrt(Xp.^2+Yp^2+HT^2);
FSPL_p = (4*pi*rho_p/lmda).^2; % Free Space Path Loss for Probe
Pp_dBm = zeros(length(Xp),length(thta),length(phi));
Pp_loc = zeros(1,length(Xp));
for pp = 1:length(Xp)
Pp_dBm(pp,:,:) = 30 + 10*log10((4*pi*abs(AF_Field_P).^2)/FSPL_p(pp));
Pp_loc(pp) = max(max(Pp_dBm(pp,:,:))); % Maximum Power at Probe
end

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回答（1 个）

OCDER
OCDER 2018-7-17
Here's one example to find maximum value in a 3D matrix called A
A = randi(100, 3, 3, 50)
[x, y, z] = ind2sub(size(A), find(A == max(A(:))))
  1 个评论
Sharif Khalil
Sharif Khalil 2018-7-17
What I am looking for is for every value of x, the maximum value of the matrix y and z. which will give an answer looks like x =1; y = 80; z = 50; x = 2; y = 30; z = 100; and so on. Thanks

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