How do I sort an array in descending order without using the sort function?

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Jillian Sweatt
Jillian Sweatt 2015-11-5
回答： Thorsten 2015-11-5
A = [2 1 4 3 6 5 8 7 10 9 12 11 14 13 16 15 18 17 20 19]

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Thorsten
Thorsten 2015-11-5
You can use bubble sort:
swapped = 1;
while swapped
swapped = 0;
for i=1:numel(A)-1
if A(i+1) > A(i)
temp = A(i); A(i) = A(i+1); A(i+1) = temp; swapped = 1;
end
end
end

更多回答（2 个）

Walter Roberson
Walter Roberson 2015-11-5
flipud(unique(A(:)))
Stephen23
Stephen23 2015-11-5
编辑：Stephen23 2015-11-5
Here are a few ways to sort an array of unique values without using sort:
sortrows(A(:),-1)
A(end:-1:1) = unique(A);
fliplr(union(A,A(1)))
fliplr(setdiff(A,NaN))

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