How can i find maximum value at each (x,y)location and the plane which contains it in a multidimensional matrix

Question

ipwork 2019-8-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/477422-how-can-i-find-maximum-value-at-each-x-y-location-and-the-plane-which-contains-it-in-a-multidimensi

评论： Star Strider 2019-8-24

I have multiple matrices of (M by N) sizes. I need to find which among them contains maximum value at each location(x,y). For loop is very time consumming. Need vectorized operation. Using Matlab 2016 version. Thanks.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Star Strider 2019-8-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/477422-how-can-i-find-maximum-value-at-each-x-y-location-and-the-plane-which-contains-it-in-a-multidimensi#answer_388881

在 MATLAB Online 中打开

Try this:

M = 10;
N = 15;
A1 = rand(M,N);                                         % Create Matrix
A2 = rand(M,N);                                         % Create Matrix
A3 = rand(M,N);                                         % Create Matrix
A4 = rand(M,N);                                         % Create Matrix
Acat = cat(3, A1, A2, A3, A4);                          % Concatenate Along Dimension 3
[Max,MaxIdx] = max(Acat, [], 3);                        % Find Max & inIndex Along Dimension 3

The ‘Max’ value is the value of the maximum amongst the matrices created y ‘Acat’, and ‘MaxIdx’ is the matrix with that value, correspoinding to the order in which you concatenated them.