How to get the sum of each row in a matrix.

The last line in this sums each row in the matrix, is their a way to tell it to do that with out having to type out a sum for each row of the matrix.

carbon=12;
hydrogen=1;
oxygen=16;
Methanol=[1 4 1];
ethanol=[2 6 1];
propanol=[3 8 1];
butanol=[4 10 1];
pentanol=[5 12 1];
atomic_weights=[carbon hydrogen oxygen];
mixer=[Methanol; ethanol; propanol; butanol; pentanol];
unsumed=[mixer.*atomic_weights];
question_5=[sum(unsumed(1,:)),sum(unsumed(2,:)),sum(unsumed(3,:)),sum(unsumed(4,:)),sum(unsumed(5,:))]

Answer 1

[Voss]

% sum over 2nd dimension
question_5 = sum(unsumed,2)

[Voss]

That makes question_5 a column vector. Transpose it to exactly match the row-vector result you had before:

% sum over 2nd dimension
question_5 = sum(unsumed,2).'