Locating global max in 3D plot

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John Paul 2021-1-22

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https://ww2.mathworks.cn/matlabcentral/answers/724333-locating-global-max-in-3d-plot

评论： Star Strider 2021-1-23

I'm working on some MATLAB code but I have encountered a problem that has hindered my progress.

Kindly would you assist me on how I may locate a global maxima value in a case where I have more than one maximas in a 3D plot.

I'm using this

Idx = find((Pmusic(:) == max(max(Pmusic(:)))));

[PmusicmaxRow,PmusicmaxCol] = ind2sub(size(Pmusic), Idx);

but it brings all the maximas but I am only interested with the indices of the global maxima.

采纳的回答

Star Strider 2021-1-22

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在 MATLAB Online 中打开

Try this:

[maxval,Idx] = max(Pmusic(:));
[PmusicmaxRow,PmusicmaxCol] = ind2sub(size(Pmusic), Idx);

I obviously cannot test this with your matrix, however it worked correctrly when I tested it with my test matrix.

Respected Sir, You are absolutely correct. This section of the code is supposed to genereate indices for the global maximas for 10 iterations and that is the reason ‘aaa’ and ‘ccc’ are (1x10) vectors. Thank you so much for your invalauble advice. You have made me move a step further with my work.