[Rd] Changes in the MEMSS package (data sets from Pinheiro and Bates, 2000, without the groupedData classes)

Gabor Grothendieck ggrothendieck at gmail.com
Tue Jul 24 16:57:48 CEST 2007

Does this include datasets such as CO2 and ChickWeight
which are in the datasets package?

Could you post a list of the specific datasets you are referring to
so there is no confusion what this is about.

On 7/24/07, Douglas Bates <bates at stat.wisc.edu> wrote:
> Some time ago Deepayan and I created a package called MEMSS for the
> data sets from the nlme package  as data frames but not groupedData
> objects.  Because of advances that Deepayan has made in lattice
> graphics many of the specialized plotting methods for the groupedData
> objects are no longer needed.  It is easier and less confusing to
> store these data sets as data frames rather than as groupedData
> objects.
> I propose making two further changes in these objects.  Those objects
> typically had factors converted to ordered factors in an artificial
> way and I plan to revert them to factors.  Also, I will relabel any
> factors with (26 or fewer) numeric levels with letters and to remove
> the "ginfo" attribute.
> Please tell me if this will cause you hardship because you have used
> these data sets in your work and depend on the current formulation.
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