creating a new vector relative to the matrix
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Przemyslaw Kaluski
le 9 Mai 2015
Commenté : Nobel Mondal
le 11 Mai 2015
I have an example matrix:
1 19:20:43 DC 7,102 V AUTO
2 19:20:44 DC 7,103 V AUTO
3 19:20:44 DC 7,105 V AUTO
4 19:20:45 DC 7,105 V AUTO
5 19:20:46 DC 6,105 V AUTO
6 19:20:47 DC 1,105 V AUTO
7 19:20:48 DC 0 V AUTO
8 19:20:48 DC 0 V AUTO
9 19:20:49 DC 1 V AUTO
10 19:20:50 DC 7,105 V AUTO
I’ d like to create a new vector, which will assign to time from a first row of matrix (19:20:43) value 1, to time from second row (19:20:44) – value 2 e.c.t.. But if the time value repeats, assign the same value for both time values. For matrix above, new vector should be t=[1;2;2;3;4;5;6;6;7;8].
I should probably use loop for, and function if, but really don’t know how to do it.
I hope you understood my problem :)
0 commentaires
Réponse acceptée
Nobel Mondal
le 9 Mai 2015
% A = your 10x6 original matrix;
uRows = unique(A, 'rows');
result = zeros(6,1);
for i=1:size(uRows, 1)
cols = find(ismember(A, uRows(i,:), 'rows'));
result(cols) = i;
end
0 commentaires
Plus de réponses (3)
Muhammad Usman Saleem
le 9 Mai 2015
clear some questions for me. what is the size of the following matrix? how many rows and column it has?
1 19:20:43 DC 7,102 V AUTO
2 19:20:44 DC 7,103 V AUTO
3 19:20:44 DC 7,105 V AUTO
4 19:20:45 DC 7,105 V AUTO
5 19:20:46 DC 6,105 V AUTO
6 19:20:47 DC 1,105 V AUTO
7 19:20:48 DC 0 V AUTO
8 19:20:48 DC 0 V AUTO
9 19:20:49 DC 1 V AUTO
10 19:20:50 DC 7,105 V AUTO
tell me are these 10 different matrixs or only single one? As matrix has same data type.i am getting confuse you are using numeric and string in matrix.This should be structure case..
0 commentaires
Przemyslaw Kaluski
le 10 Mai 2015
1 commentaire
Nobel Mondal
le 11 Mai 2015
This code would strictly hold up for the values that you have shown in the question. But, say what about when the minutes (column 5) change as well.
Anyway, assuming z is your original 10x6 matrix, the condition checking line is incorrect.
if z(i+1,6)==z(i,6); % Use '==' not the assignment operation '='
Voir également
Catégories
En savoir plus sur Logical dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!