Unique function for rows with switched elements

version 1.0.1 (1.68 KB) by Sim
Find unique rows in a 2-element matrix, when rows have switched elements. E.g. when row "1 5" and row "5 1" are both present.

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Updated Thu, 09 Jun 2022 14:44:05 +0000

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This Matlab function provides a way to find:
  1. unique 2-element rows, when rows have switched elements ("u"), i.e., for example, both rows "1 5" and "5 1" are present in the input matrix,
  2. rows with switched elements ("s"), and
  3. indices of rows with switched elements ("is").
Note: this function is designed ONLY for 2-column matrices as input.
% Example of usage:
clear all
clc
% input (here, the row "1 2" is repeated as row "2 1" and the the row "1 5" is repeated as row "5 1")
a = [1 2
4 5
5 1
2 1
1 2
5 2
5 1
1 5
2 9
5 1]
% output
[u,s,is] = unique_switch(a)
% command window
>> u =
1 2
1 5
2 9
4 5
5 2
>> s =
2 1
5 1
>> is{:}
ans =
1
4
5
ans =
3
7
8
10

Cite As

Sim (2022). Unique function for rows with switched elements (https://www.mathworks.com/matlabcentral/fileexchange/112920-unique-function-for-rows-with-switched-elements), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2022a
Compatible with any release
Platform Compatibility
Windows macOS Linux
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