how to sort the element of one column in a 220*3 matrix in ascending mode, keeping the elements of other columns dependent on the elements of sorted column ?
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
i have a 220*3 matrix. the elements of first column in this matrix is related to the elements of other 2 columns. how can i sort the elements of first column in ascending mode, moving the elements of other columns correlated to the elements of first column?
0 Commenti
Risposta accettata
Stephen23
il 20 Lug 2015
Modificato: Stephen23
il 20 Lug 2015
If you want to move the entire row based on how the first column is sorted, then use sortrows with its second optional argument (the rows move along with the first column):
sortrows(X,1)
For example:
>> X = [9,1,1,1;1,2,2,2;5,3,3,3]
X =
9 1 1 1
1 2 2 2
5 3 3 3
>> sortrows(X,1)
ans =
1 2 2 2
5 3 3 3
9 1 1 1
If you want to sort only the first column then just use sort and the appropriate indexing (the other columns do not change):
X(:,1) = sort(X(:,1));
Più risposte (1)
Jan
il 20 Lug 2015
And this happens inside sortrows:
X = rand(220, 3);
[Y, Order] = sort(X(:, 1));
R = X(Order, :);
0 Commenti
Vedere anche
Categorie
Scopri di più su Shifting and Sorting Matrices in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!