How Can I determine minimum value in a double array?

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Mira le
Mira le 2021 年 11 月 28 日
コメント済み: Chunru 2021 年 11 月 29 日
Hello every one;
have an array :
vect =[ 2.6660 2.2852 10.0000 3.2617 10.0000 10.0000 9.8532]
I want to get the mininmum value as well as its position
here in this vector:
min = 2.2852
position = 2
please help me!
I need it to continue my program
Thank you

回答 (2 件)

Image Analyst
Image Analyst 2021 年 11 月 28 日
Don't use the built-in min function. It's second return argument will only return the location of the first occurrence of the min value. A more robust and general solution is to use min() in combination with find():
vect =[ 2.6660 2.2852 10.0000 2.2852 3.2617 10.0000 10.0000 9.8532];
minValue = min(vect(:))
minValue = 2.2852
% Find all the rows and columns where that value occurs:
indexes = find(vect == minValue)
indexes = 1×2
2 4
See how in this case, where the min occurred in two locations, it found both of them: one at vect(2) and another one at vect(4).
  2 件のコメント
Mira le
Mira le 2021 年 11 月 28 日
an error display
Subscript indices must either be real positive integers or logicals.
in the line minValue = min(vect(:))
Image Analyst
Image Analyst 2021 年 11 月 28 日
clear('min'); % Get rid of your min variable you previously created.
vect =[ 2.6660 2.2852 10.0000 2.2852 3.2617 10.0000 10.0000 9.8532];
minValue = min(vect(:))
% Find all the rows and columns where that value occurs:
indexes = find(vect == minValue)

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Chunru
Chunru 2021 年 11 月 28 日
vect =[ 2.6660 2.2852 10.0000 3.2617 10.0000 10.0000 9.8532];
[vmin, idx] = min(vect)
vmin = 2.2852
idx = 2
  4 件のコメント
Mira le
Mira le 2021 年 11 月 28 日
I don't know where the problem is but the same error still display
I use matlab 2017a version
Chunru
Chunru 2021 年 11 月 29 日
Then show your code so that we can help.

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