% Different types of multiplications in Octave/Matlab
% 2015-04-13, RB
 
y = [10 20 30]'  % column vector
x = [1 2 3]'     % column vector
y = y'          % row vector, transposed
 
s = y*x         % scalar product, left row, right column
 
C = x*y         % Cartesian product, matrix with all possible combinations
 
y2 = y.*y       % element-wise multiplication, result is row vector
x2 = x.*x       % element-wise multiplication, result is column vector
z  = x.*y'      % element-wise multiplication, result is row vector