Sarah Hamilton
>
> In Stata 8, there is a new command called nlcom where you can
> define your parameters for a given distribution. I have the
> following code for defining the Weibull distribution and I
> haven't been able to decipher from help files or online how to
> interpret it. Does anyone know what the code following each
> parameter (theta and beta) means in Stata 8? I would like to
> know how it relates back to the pdf of the Weibull
> distribution. Thanks for any help.
>
> nlcom (theta:exp([ln_p]_b[_cons])) (beta:exp(-_b[_cons]))
>
Bobby Gutierrez's recent posting applies.
theta and beta are just parameter names supplied,
more or less conventional. The rest
are just expressions in Stata syntax
defining those in terms of stuff already
calculated.
_b[_cons] is always Stata jargon for the
intercept of an equation.
exp() is the exponential function.
[ln_p] in front specifies the equation
being used.
Nick
[email protected]
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
