Newbie needing to create matrix elements dependent on other elements

Hi

I have a matrix of many rows and 6 columns

A1 A2 A3 A4 A5 A6 
B1 B2 B3 B4 B5 B5
etc

I want to create a new column 7 that will contain

A7 = sqrt(A1^2+A2^2+A3^2)
B7 =sqrt(B1^2+B2^2+B3^2)
etc.

How would I do this please?

thanks

Answer 1

[James Tursa]

A = your Nx6 matrix
A(:,7) = sqrt(sum(A(:,1:3).*A(:,1:3),2));  % The RSS of the 1st 3 columns by row

[John Massey]

Thanks very much.