MATLAB: Matrix Multiplication with large vectors

Question

Hi,

If I have following problem how can I formulate it in matlab

A=
1  3
2  4
b=
xi
yi

where xi and yi are column vectors with lets say 100 values in each how can I input this problem in Matlab by using following formula

[z1 = A*b
z2]

Please note I have very large martix with vectors xi and yi and I want out put two matrices z1 and z2

Thanks in advance, jay

thanks

Answer 1

T = arrayfun(@(x,y) A*[x;y], xi, yi, 'Uniform', 0);
z1z2 = vertcat(T{:});
z1 = z1z2(:,1);
z2 = z1z2(:,2);

However, this formulation of the code would not be efficient if you had a small A and long vectors. In your actual situation, what size() is your A ?