Find unique in matrix of x,y coordinates

36 visualizzazioni (ultimi 30 giorni)
Hello, I would love your help.
If I have a matrix of x,y coordinates for example:
x y
A=[ 2.5 3.5
1.2 3.5
2.2 1.2
1.2 3.5
4.0 2.2 ]
How do I find a unique of this? In the above example one instance of x,y (1.2, 3.5) will be removed?

Risposta accettata

Kelly Kearney
Kelly Kearney il 19 Dic 2017
To find unique rows, you can use unique with the 'rows' option. (The 'stable' option preserves the input order, if that's important for your application).
unique(A, 'rows', 'stable')

Più risposte (2)

Image Analyst
Image Analyst il 19 Dic 2017
Try unique() with the 'rows' option:
uniqueRowsOfA = unique(A, 'rows')

Kaushik Lakshminarasimhan
Kaushik Lakshminarasimhan il 19 Dic 2017
Did you try this?
[C,IA] = unique(A,'rows');
C contains all unique rows of A. IA contains the indices of the rows of A that are in C. So if you want the indices of the rows that were removed, you can use:
[nrows,~] = size(A);
notIA = setdiff(1:nrows,IA); % duplicate rows

Categorie

Scopri di più su Matrices and Arrays in Help Center e File Exchange

Tag

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by