how to add two matrix

hi guys i

[Intisar Mohammed]

Addition of two square matrices 𝐴 𝑎𝑛𝑑 𝐵 of same order.

Answer 1

[Roger Stafford]

Let 'a' and 'b' be two row vectors. To add zeros to the left side of the shorter one so as to have equal lengths do this:

 na = length(a);
 nb = length(b);
 n = max(na,nb);
 a2 = [zeros(1,n-na),a];
 b2 = [zeros(1,n-nb),b];

[janny]

how to make it run for two matrix with 10 or more vectors? i try it it didn't work for matrix.

[Roger Stafford]

Let 'a' and 'b' be two matrices with the same number of rows, m.

 na = size(a,2);
 nb = size(b,2);
 n = max(na,nb);
 a2 = [zeros(m,n-na),a];
 b2 = [zeros(m,n-nb),b];

(It should be obvious how to also deal with matrices with both differing numbers of columns and differing numbers of rows.)

[janny]

it works very fine.. thanks a lot

[Image Analyst]

Can you go ahead and officially "Accept" his answer and also "vote" for it to give him credit/reputation points for it? Thanks in advance.