On 8 Dec 2003, Christoph Lehmann wrote: > (1)In polr(), is there any way to calculate a pseudo analogue to the > R^2. Just for use as a purely descriptive statistic of the goodness of > fit?
First define the statistic you are interested in! There is an absolute measure of fit, the residual deviance. > (2) And: what are the assumptions which must be fulfilled, so that the > results of polr() (t-values, etc.) are valid? How can I test these > prerequisites most easily: I have a three-level (ordered factor) > response and four metric variables. This is discussed with worked examples in the book that MASS supports, so please consult your copy. -- Brian D. Ripley, [EMAIL PROTECTED] 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 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
