How to use Uniquetol without sorting?
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Hello everyone,
I'm using the function "Uniquetol" to remove the duplicate vector from a matrix A which the size is (3, 10).
B = ( uniquetol(A', 1e-6, 'ByRows', 1) )';
It works very well, but it is also sorting my matrix which what I don't want
Please, can anyone tell how can we use the function "Uniquetol" without sorting ?
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Accepted Answer
Guillaume
on 12 Jul 2019
[~, colindices] = uniquetol(A', 1e-6, 'ByRows', true); %get indices of unique value. Is sorted BY VALUE
B = A(:, sort(colindices)) %Use the indices sorted BY INDEX instead
4 Comments
Bruno Luong
on 28 Oct 2020
Both solutions are equally valid. They respect the order in the original matrix.
Sorry Huy, there is not reason your solution is right and other is wrong.
Min Zhang
on 23 Nov 2021
Try this:
A = [0.05 0.11 0.18; ...
0.46 0.52 0.76;...
0.34 0.36 0.41; ...
0.18 0.21 0.29; ...
0.46 0.52 0.76;...
0.05 0.11 0.18;];
%
[~, colindices] = uniquetol(A, 'ByRows', true)
sort(colindices)
% get indices of unique value. Is sorted BY VALUE
B = A(sort(colindices),:)
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