Arrange (array of 9 numbers) in ascending order. (no sort)

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Aviroop Dutt Mazumder
评论： Larissa Monjaraz 2021-3-7
Please suggest me to find a commnad using for loop to Arrange (array of 9 numbers) in ascending order without using sort command. I used the following one, which didn't work
A = [4 16 36 64 1 9 25 49 81] B = [] for i = 1:9
B(i) = max(A)
find max(A)== 0
end

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回答（2 个）

Honglei Chen
Honglei Chen 2012-9-19
You can do
B = unique(A)
But seriously, are you trying to implement a sort algorithm in MATLAB? If so, there are many algorithms available, e.g., quick sort
http://en.wikipedia.org/wiki/Quicksort
Jan
Jan 2012-9-22
Improvement of your method:
A = [4 16 36 64 1 9 25 49 81];
B = zeros(1, 9); % Pre-allocate!
for ii = 1:9
[value, index] = max(A);
B(ii) = value;
A(index) = -Inf;
end
For 9 elements an insert-sort would be fine also.
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