[R] family

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Jul 21 08:41:33 CEST 2005

You want to aim to write a family for R, not find the equivalents of S 
constructs -- they are different and so exact equivalents do not exist. 
In particular, an R family has several components which an S family does 

There are lots of example families for you to follow (e.g. see ?family and 
the negative binomial families in the MASS package).  Others have found 
reading the sources sufficient to write new families.

On Thu, 21 Jul 2005, Dr L. Y Hin wrote:

> I am in the process of migrating an S programme library to R, and it involves 
> the family entity.
> I have checked ?family but it does not give much detail of its components.
> I will be very grateful if anyone can point towards sources/ways to look up 
> on this areas
> with an aim to find the equivalance of the followings in S:
> family()$inverse
> family()$deriv
> family()$variance
> family()$deviance t

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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