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This is to announce a new package MLCM on CRAN. The package provides functions for estimating perceptual scales by maximum likelihood from data collected in a conjoint measurement experiment. Data for conjoint measurement are typically collected using a psychophysical procedure. The stimuli vary along 2 or more dimensions. The observer...

This is to announce a new package MLCM on CRAN. The package provides functions for estimating perceptual scales by maximum likelihood from data collected in a conjoint measurement experiment. Data for conjoint measurement are typically collected using a psychophysical procedure. The stimuli vary along 2 or more dimensions. The observer...

...sons. The problem is a generalization of Bradley-Terry but it differs from some generalizations in that the comparisons are not pairwise, and they don't produce a full ordering, just that one is preferred to the other four possibilities. I have had a look at the BradleyTerry2, eba, pmr and MLCM packages, none of which appear to provide the required functionality. I have also looked at a number of papers (Hunter, 2004; Firth, 2005; Huang Weng and Lin, 2006; and Fujimoto, Hino and Murata 2011). I think fitting using maximum likelihood should be possible, but would welcome any pointers t...

CRAN (and crantastic) updates this week New packages ------------ Updated packages ---------------- New reviews ----------- This email provided as a service for the R community by http://crantastic.org. Like it? Hate it? Please let us know: cranatic at gmail.com.

...(0.9-4), earth (2.3-4), epicalc (2.9.2.2), fields (6.01), fishmethods (1.0-1), Formula (0.2-0), frontier (0.995-2), frontier (0.995-6), GWAF (1.1), HyperbolicDist (0.6-2), impute (1.18.0), integrOmics (2.4), klaR (0.6-0), languageR (0.955), mboost (1.1-3), mcmc (0.7-2), mefa (3.1-2), mhsmm (0.3.1), MLCM (0.0-3), MNP (2.6-1), modTempEff (1.1), mstate (0.2.2), NeatMap (0.3.1), nFactors (2.3), nplplot (4.4), OAIHarvester (0.0-6), OjaNP (0.9-3), party (0.9-999), pcalg (0.1-9), phmm (0.6.1), plm (1.2-0), pomp (0.25-4), QCA (0.6-2), qpcR (1.2-2), R.huge (0.1.9), RcmdrPlugin.DoE (0.5-2), RQDA (0.1-8), sd...