How can I turn a matrix into several submatrices and add up certain submarices?
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi community,
I am wondering how to turn a large matrix (9800x9800) into 49x49 submatrices (each with 200x200 cells). Following that, I want to do the following operations:
- sum up all matrices on the diagonale
- sum up all matrices in the lower triangle
- sum up all matrices in the upper triangle
I have been succesful with the first item using the following code:
for i = 1 : meta.NCOUNTRIES;
i
Z_all{i} = Z((i - 1) * meta.NSECTORS + 1 : i * meta.NSECTORS, (i - 1) * meta.NSECTORS + 1 : i * meta.NSECTORS);
end
Z_RoW = zeros(meta.NSECTORS);
for i = 1 : meta.NCOUNTRIES;
i
Z_RoW = Z_RoW + Z_all{i};
end
where
- meta.NCOUNTRIES = 49
- meta.NSECTORS = 200
- meta.Zdim = 9800
I think the above code is not ideal, i.e. it could be done w/o having to use a loop. Also, I have troubles with finding and summing up the elements in the lower/upper triangle.
Thank you!
0 commentaires
Réponses (1)
Voir également
Catégories
En savoir plus sur Data Type Conversion 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!