Calculate mean of every nth row in a table
6 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
chiefjia
le 26 Oct 2021
Commenté : chiefjia
le 28 Oct 2021
Dear MATLAB experts,
I'm trying to get the mean value of every third row starting from the first row in a table. So, I would like to get the mean value of the 1st, 4th, 7th, 10th, 13th, 16th, 19th... up to the 666679th row and apply the same approach to the other remaining rows, 2nd, 5th, 8th, 11th, 14th... up to the 666680th row and to the 3rd, 6th, 12th, 15th, 18th... up to the 666681th row.
This means that I would like to get 3 mean values and I want to do this for the column of the table you will find attached to this post.
I would really appreciate your help since I don't even know how to approach this problem. Thank you in advance.
0 commentaires
Réponse acceptée
André Kucharzewski
le 26 Oct 2021
>> v = randi(100,100,1)
>> mean(v(1:2:end)
or mean(v(1:3:end)
in your case end could be 666679
3 commentaires
DGM
le 28 Oct 2021
Yes. That will take the means of three interleaved samplings of v.
Consider the example:
v = [1 2 3 1 2 3 1 2 3 1 2 3];
% samples
v1 = v(1:3:end)
v2 = v(2:3:end)
v3 = v(3:3:end)
% means
mean(v1)
mean(v2)
mean(v3)
Plus de réponses (0)
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!