MATLAB: Removing duplicates in an array

duplicateunique

If i have the following array

a =[1,1,1,2,2,1,1,6,6,6,8,8,2,2,3,3,2,2]

When i do unique(a,'stable'), i get

[1,2,6,8,3]

I want the following result

[1,2,1,6,8,2,3,2]

Best Answer

b = a(logical([1 (diff(a)~=0)]))

Related Solutions

MATLAB: What determines the shape of a logically indexed array

Just to complete the story, the answer seems to be:

If B is a logical array and A is any array, then A(B) is equivalent (but faster) way to produce the same result as A(find(B)), including the shape of the output.

MATLAB: Find how many times same element is repeated

A=[9,8;7,6;1,2;2,4;3,4;3,4;4,7;6,7;8,6;9,8;7,6];
a = unique(A,'rows');
R = zeros(size(a,1),1);
for k = 1:size(a,1)
    R(k) = nnz(ismember(A,a(k,:),'rows'));
end
Result = table(a,R,'VariableNames',{'Rows','Times'})

Gives:

Result =
  8×2 table
     Rows     Times
    ______    _____
    1    2      1  
    2    4      1  
    3    4      2  
    4    7      1  
    6    7      1  
    7    6      2  
    8    6      1  
    9    8      2  
>>

Best Answer

Related Solutions

MATLAB: What determines the shape of a logically indexed array

MATLAB: Find how many times same element is repeated

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