Error using * Inner matrix dimensions must agree.

Hello

I was trying to plot using the RK-4 method but i get this error. Can someone help me please? Thank You

Error in HolaGB (line 87)

g6_2 = xi*(H(i)+H2*g5_1)+gamma*(Ig(i)+H2*g2_1)-mu*(R(i)+H2*g6_1);

[KSSV]

This error occurs when you multiply matrices of dimensions which do not obey rule of multiplcation. We can help more on shwoing complete code.