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March 19th, 2016, 03:28 AM  #1 
Member Joined: Sep 2013 Posts: 83 Thanks: 0  Matrix notation
usinging the matrix notation Y=$\displaystyle \beta $X+u and knowing that x is an n x k matrix can you write the x matrix as this? $\displaystyle \left( {\begin{array}{*{20}{c}} {{x_{11}}}& \ldots &{{x_{1k}}}\\ \vdots & \ddots & \vdots \\ {{x_{n1}}}& \cdots &{{x_{nk}}} \end{array}} \right)$ 
March 24th, 2016, 08:45 AM  #2 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,194 Thanks: 871 
Yes, it can.


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