second maximum- not returning index
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Used the following code:
function [i,y] = second_max( x )
[a,b]=max(x)
[i,y] = max(x(x==a))
end
e.g I test this with vector [ 1 2 3 4 4 3 2 1], expecting i to give 5 - the value of the second maximum, but instead it is returning y and I am not sure why??
Many thanks !
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回答 (1 件)
Image Analyst
2020 年 11 月 21 日
True. That's just the way max() works. It only returns the first index if the max exists at multiple indexes. To find all the indexes where the max occurs you need to use find():
maxValue = max(x)
indexes = find(x == maxValue)
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