Using this example, could someone tell me how to multiply a matrix by a vector?
$\left(\begin{array}{ccc} A & B & C \\ D & E & F \\ G & H & I \end{array}\right) * \left(\begin{array}{c} X \\ Y \\ Z \end{array} \right) = ? $
Using this example, could someone tell me how to multiply a matrix by a vector?
$\left(\begin{array}{ccc} A & B & C \\ D & E & F \\ G & H & I \end{array}\right) * \left(\begin{array}{c} X \\ Y \\ Z \end{array} \right) = ? $
You get:
$\begin{pmatrix}AX+BY+CZ\\DX+EY+FZ\\GX+HY+IZ\end{pmatrix}$
The method is the same as multiplying two matrices of compatible sizes, in the special case that the second has only a single column.