Matrix notation for vector stacking

[hadron23]

Hello,

I have a row vector defined as,

$$X=\{x_1,x_2,\ldots,x_L\}$$
I wish to "stack" this vector vertically, a total of N times, such that the result is a matrix of the form,

$$\begin{align}Y = \left[ \begin{array}{cccc}<br /> x_1 & x_2 & \ldots & x_L \\<br /> x_1 & x_2 & \ldots & x_L \\<br /> . & . & . & .\\<br /> . & . & . & .\\<br /> . & . & . & .\\<br /> x_1 & x_2 & \ldots & x_L \end{array} \right]<br /> \end{align}$$
I want to write this in matrix notation, that is, using only vectors and matrices, and not any summations or other operators. I am not sure how to do this cleanly, any help would be greatly appreciated :)

Thank you.

 

[micromass]

Hi hadron23!

What about

$$(1,1,...,1)^T.(x_1,...,x_n)$$

 

[hadron23]

In hindsight, this is stupidly simple. Thanks!