how to sum up all rows and put the value in a new column next to the last one

Hello I am trying to sum up all the rows in a matrix, and put the sum in a new column just next to the last one in the same matrix. the number of rows is 1340, but the number of columns is random, does anyone have any idea how to make it in matlab?

many thanks!

[José-Luis]

What have you tried so far? Please look at the documentation:

 doc sum

[Jan]

Please use meaningful tags. All questions in a Matlab forum concern "Matlab". Thanks.

Answer 1

[Jan]

A = rand(15, 1340);  % Test data
B = [A, sum(A, 2)];

Is this solution surprising to you? If so, please read the "Getting Started" chapters of the documentation, where such fundamental basics are explained exhaustively.