Problem 2456. remove single elements

Created by rifat

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Given a vector of integers, remove the elements that have appeared only once. The output elements should be in exact order as the input except the single elements being removed.

Example:

Input: vec = [2 2 1 2 3 4 1 2];
Output: [2 2 1 2 1 2];

Loops are not allowed.

Solve

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Last solution submitted on Jul 29, 2019

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2 Comments

2 Comments

Guillaume on 21 Jul 2014

Since matlab has so many different ways of representing the empty set, could you test for emptiness using isempty(...) rather than isequal([], ...) ?

shahriar memaran on 25 Mar 2017

Test suit # 4 should not compare out = [] with output of the function but rather isempty(out) !!!

Solution Comments

Solution 490227

2 Comments

2 Comments

Harish Maradana on 25 Aug 2014

function A=removeSingle(A)
[n, bin] = histc(A, unique(A));
multiple = find(n ==1);
index = find(ismember(bin, multiple));
A(index)=[];
end
failed for 4 test suit help me

Binbin Qi on 27 Oct 2014

>> A = 1;A(1)=[];size(A)
ans =
1 0
>> size([])
ans =
0 0

Problem 2456. remove single elements

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Problem 2456. remove single elements

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