[R] Weibull Likelihod function.

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Aug 6 17:35:48 CEST 2008

For a log-likelihood, just  sum values of dweibull(x, log=TRUE)

On Wed, 6 Aug 2008, rkevinburton at charter.net wrote:

> Is there a likelihod function for the Weibull distribution in 'R'? I found the following reference:
> http://www.weibull.com/LifeDataWeb/weibull_log_likelihood_functions_and_their_partials.htm
> But I had a hard time understanding the parameters required Particularly 'number of groups of times-to-failure data points", "number of groups of suspension data points", and "number of interval failure data groups".
> Maybe if there is a likelihood function within 'R' the documentation will be a little better and contain some examples.
> I would like the likelihood function for some Bayesian inference and the Weibull distribution seems to closely resemble my prior data distribution.
> Thank you.
> Kevin

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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