How to sum columns of a matrix in MATLAB in specified number of columns?

2 views (last 30 days)
I have a matrix A of size 2500*500. I want to sum each 10 columns and get the result as a matrix B of size 2500*50. that is, the first column of matrix B is the sum of first 10 columns of matrix A, the second column of matrix B is the sum of second 10 columns of matrix A and so on. Since I have too many number of matrices like A and I have to do this operation hundreds of times, it is highly time consuming to do that using for loop.
How can I do this without a for loop?

Accepted Answer

Vladimir Sovkov
Vladimir Sovkov on 17 Jan 2020
B=squeeze( sum( reshape(A,size(A,1),10,[]) ,2) );

More Answers (1)

KSSV on 17 Jan 2020
A = rand(2500,500) ;
B = reshape(A,2500,10,[]) ;
iwant = squeeze(B,2) ;


Find more on Elementary Math in Help Center and File Exchange


Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by