2.53 sum all rows in a matrix

Given the folowing 2D matrix \(A\) find the sum of each row

\[ \begin {pmatrix} 1 & 2 & 3\\ 4 & 5 & 6\\ 7 & 8 & 9 \end {pmatrix} \]

2.53.1 Mathematica

mat={{1,2,3}, {4,5,6}, {7,8,9}} Total[mat,{2}]

Out[2]= {6, 15, 24}

 

2.53.2 Matlab

A=[1 2 3;4 5 6;7 8 9]; sum(A,2)

ans = 6 15 24

 

2.53.3 Maple

A:=Matrix([[1,2,3],[4,5,6],[7,8,9]]); map(x->add(x),convert(A,listlist)) #or may be better is `add`~([LinearAlgebra:-Row(A,[1..-1])])

[6, 15, 24]