MATLAB: How to sort an array in descending order without using the sort function

arrayssort

A =  [2 1 4 3 6 5 8 7 10 9 12 11 14 13 16 15 18 17 20 19]

Best Answer

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

Related Solutions

MATLAB: How to sort a matrix in a random order

E.g.,

>> x = reshape(1:24,4,6)
x =
     1     5     9    13    17    21
     2     6    10    14    18    22
     3     7    11    15    19    23
     4     8    12    16    20    24
>> x(:) = x(randperm(numel(x)))
x =
     7    12     3    19    16    23
    20    24    10    11     1    17
    21    14     8     5    13    18
     6    22    15     4     2     9

MATLAB: How do you remove duplicates without using unique

One approach:

A = [1;2;3;3;4;5;6;7;7;8;9];
Ac = zeros(size(A));
for k1 = 1:length(A)-1
    Ac(k1) = sum(A(k1) == A(k1+1:end));
end
Out = A(Ac == 0)
Out =
       1
       2
       3
       4
       5
       6
       7
       8
       9

Best Answer

Related Solutions

MATLAB: How to sort a matrix in a random order

MATLAB: How do you remove duplicates without using unique

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