# [Tex/LaTex] Matrix in Latex

matrices

I am new to Latex, and I have been trying to get the matrix of following form

    [x11 x12 x13 . . . . x1n
x21 x22 x23 . . . . x2n
.
.
.
.
xd1 xd2 xd3 . . . . xdn]


Where the letters accompanying the elements are subscripts '11 12 13' etc. I tried it in the following fashion

    
\begin{bmatrix}
x_{11}&x_{12}&x_{13}&.&.&.&.&x_{1n}


And so on in similar fashion. I get errors when I use the above method and I know its amateurish. Can you please tell me how to get it done the right way? I even tried including '\' for the periods. Thanks in advance.

\documentclass{article}
$\begin{bmatrix} x_{11} & x_{12} & x_{13} & \dots & x_{1n} \\ x_{21} & x_{22} & x_{23} & \dots & x_{2n} \\ \hdotsfor{5} \\ x_{d1} & x_{d2} & x_{d3} & \dots & x_{dn} \end{bmatrix} = \begin{bmatrix} x_{11} & x_{12} & x_{13} & \dots & x_{1n} \\ x_{21} & x_{22} & x_{23} & \dots & x_{2n} \\ \vdots & \vdots & \vdots & \ddots & \vdots \\ x_{d1} & x_{d2} & x_{d3} & \dots & x_{dn} \end{bmatrix}$