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finding min matrix and where that is

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bachelor student
bachelor student 2016 年 8 月 10 日
コメント済み: Star Strider 2016 年 8 月 10 日
Hi all I have a matrix, I want to find its minimum and where that minimum is, can anybody help me with that?

回答 (1 件)

Star Strider
Star Strider 2016 年 8 月 10 日
This works to find the first minimum:
M = randi(9, 5); % Create Matrix
[Mmin,lidx] = min(M(:));
[r,c] = ind2sub(size(M),lidx);
Result = [Mmin r c]
If there are mor than one values of the minimum:
M = randi(9, 5); % Create Matrix
Mmin = min(M(:))
[r,c] = find(M == Mmin)
  3 件のコメント
bachelor student
bachelor student 2016 年 8 月 10 日
there is just one problem, i want to find the min, except for the zero values
Star Strider
Star Strider 2016 年 8 月 10 日
My pleasure.
To get the minimum value and locations for all values not equal to zero, this works:
M = randi([0 5], 5); % Create Matrix
Mmin = min(M(M(:) ~= 0))
[r,c] = find(M == Mmin)
(This also allows for negative values in the matrix if necessary, even though the test matrix values go from 0 to 5 here.)

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