Sum over columns excluding rows
2 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Javier
el 13 de En. de 2014
Comentada: Javier
el 14 de En. de 2014
Hi, I am quite a begginer with matlab and I wonder if someone could help me with this problem.
I have a matrix
A=[a b c d;
e f g h;
i j k l;
m n o p]
I want to get the sum of each row and then perform the same operating excluding the first column, then excluding the first two columns and then the first three columns and put all this results in a matrix. I want something like this
B=[a+b+c+d b+c+d c+d d;
e+f+g+h f+g+h g+h h;
i+j+k+l j+k+l k+l l;
m+n+o+p n+o+p o+p p]
Do you know how can I get the this result in a effiicient way? I have four columns in the example but more than 10,000 in the real problem.
Thank you in advance. Javier
0 comentarios
Respuesta aceptada
Más respuestas (1)
Azzi Abdelmalek
el 13 de En. de 2014
Editada: Azzi Abdelmalek
el 13 de En. de 2014
A = [1 2 3 4; 2 4 6 0; 3 1 2 5; 1 1 1 3]
out=fliplr(cumsum(fliplr(A),2))
Ver también
Categorías
Más información sobre Data Distribution Plots en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!