%% Dot Product of Matrices
% Create two matrices.

A = [1 2 3;4 5 6;7 8 9];
B = [9 8 7;6 5 4;3 2 1];

%
% Find the dot product of A and B.

C = dot(A,B)

% The result, C, contains three separate dot products. dot treats the columns of A and B as vectors and calculates the dot product of corresponding columns. So, for example, C(1) = 54 is the dot product of A(:,1) with B(:,1).
%
% Find the dot product of A and B, treating the rows as vectors.

D = dot(A,B,2)

% In this case, D(1) = 46 is the dot product of A(1,:) with B(1,:).
% Copyright 2012 The MathWorks, Inc.