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From |
Jonathan Hanson <[email protected]> |

To |
[email protected] |

Subject |
st: vector of independent variables in ML program |

Date |
Tue, 12 Aug 2008 09:29:48 -0400 |

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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**Follow-Ups**:**Re: st: vector of independent variables in ML program***From:*"Stas Kolenikov" <[email protected]>

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