lme4a versus lme4b
On Fri, Jul 23, 2010 at 8:24 AM, Kevin E. Thorpe
<kevin.thorpe at utoronto.ca> wrote:
Hello. I decided to update my lme4a installation to play with it on my present analysis and noticed an lme4b package at r-forge. Apologies if I missed an announcement, but is lme4 development now in beta stage with lme4b being the beta version? ?Is it the preferred development package to use now?
No. What is in lme4b is an interim version that will never see the light of day. We kept it around for purposes of cross-checking results but others should not be concerned about it. I am currently at the useR!2010 conference where Uwe Ligges spoke this morning on some of the challenges involved in maintaining CRAN, especially the Windows binaries in his case. The changes to lme4 in lme4a, in particular the use of Rcpp constructions and classes in the compiled code are somewhat problematic. Dependence on Rcpp seems to be associated with unexplained failures in some of the installation and checking. As a result it may take a bit longer than hoped to get lme4a on CRAN.
Kevin -- Kevin E. Thorpe Biostatistician/Trialist, Knowledge Translation Program Assistant Professor, Dalla Lana School of Public Health University of Toronto email: kevin.thorpe at utoronto.ca ?Tel: 416.864.5776 ?Fax: 416.864.3016
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