Adding values from columns 1:i for each column for a new matrix of the same size

6 次查看（过去 30 天）
Anna B
Anna B 2019-12-30
编辑： Stijn Haenen 2019-12-30
Hi so I have a 442x25 matrix, what I want to do is for example add values of columns 1 and 2 together to create a new column 2, add values of columns 1, 2 and 3 to create a new column 3, add values of columns 1, 2, 3 and 4 to create a new column 4 and so on until column 25 where all the values will be added. If that makes sense to anyone i would really appreciate your help!

请先登录，再回答此问题。

采纳的回答

Andrei Bobrov
Andrei Bobrov 2019-12-30
编辑：Andrei Bobrov 2019-12-30
Let A - your array (442 x 25)
out = cumsum(A,2);

更多回答（1 个）

Stijn Haenen
Stijn Haenen 2019-12-30
编辑：Stijn Haenen 2019-12-30
Something like this?
matrix=[1 2 3; 1 2 3; 1 2 3; 1 2 3];
for i=1:size(matrix,2)
matrix_new(:,i)=sum(matrix(:,1:i),2);
end

类别

在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by