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st: vector of independent variables in ML program
Greetings,
How does one refer to a vector of independent variables from within an
ML program? For example, suppose I need to write a gradient vector,
the formula for which looks something like this:
∂ ln L/ ∂ Β = (1/sigma^2) x'(y - xΒ)
where x' is a k by 1 vector of the independent variables for an
observation. I know that I can refer to y as $ML_y1 and xB as one of
the arguments (theta, for instance), but how can I call x' in the
formula? Ultimately, I will have multiple equations in this formula,
so I need to be able to specify equation from which the x's are coming.
Many thanks,
Jonathan Hanson
Assistant Professor of Political Science
Maxwell School of Citizenship and Public Affairs
100 Eggers Hall
Syracuse University
Syracuse, NY 13244
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