How to find when the maximum occurs

Question

Cam B 2022-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/1676239-how-to-find-when-the-maximum-occurs

评论： Zach Ruble 2023-9-27

I am trying to find the time, t, at which the maximum value occurs at. The variable 'maxgiven' displays a 1x5 vector of the maximum values for a set of data. Trying to find the time, t, at which each maximum value is occuring at, which would be labeled 'tmaxgiven'. The test case written belows displays an empty vector. Please use the variable names provided.

maxgiven = [max(y1(:,1)); max(y2(:,1)); max(y3(:,1)); max(y4(:,1)); max(y5(:,1))]
%test case
tmaxgiven = find(t1 == max(y1(:,1)))

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Answer 1

Arif Hoq 2022-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/1676239-how-to-find-when-the-maximum-occurs#answer_922664

在 MATLAB Online 中打开

time=(1:5)';
val1=[10 13 45 23 11]';
val2=[56 23 45 89 23]';
val3=[90 78 12 45 22]';
matrix=[time val1 val2 val3]
matrix = 5×4
     1    10    56    90
     2    13    23    78
     3    45    45    12
     4    23    89    45
     5    11    23    22
[M I]=max(matrix(:,2:end))
M = 1×3
    45    89    90
I = 1×3
     3     4     1