search for: polychotomous

Dear R users, Does anyone know if it is possible to use multinom to do a polychotomous fit using one categorical and one numeric variable as response. The doc. for multinom states that for formula , response can be K>2 classes. Is this 2 and more, or as I have understood it only greater than 2. I have tried fitting my data, but have only encountered error messages. On another no...

I've seen references to "polymars", an R implementation of Friedman's MARS algorithm. Can anyone tell me where I might be able to find this (doesn't seem to be in the contributed packages. Thanks, David -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send

...ry Data Analysis gee Generalized Estimating Equation models integrate numerical integration leaps Regression subset selection locfit Local Regression, Likelihood and Density Estimtion. mva Classical Multivariate Analysis polymars (polychotomous) regression based on Multivariate Adaptive Regression Splines polynom A collection of functions to implement a class for univariate polynomial manipulations spatial functions for kriging and point pattern analysis splines Regression Spline Funct...

...ry Data Analysis gee Generalized Estimating Equation models integrate numerical integration leaps Regression subset selection locfit Local Regression, Likelihood and Density Estimtion. mva Classical Multivariate Analysis polymars (polychotomous) regression based on Multivariate Adaptive Regression Splines polynom A collection of functions to implement a class for univariate polynomial manipulations spatial functions for kriging and point pattern analysis splines Regression Spline Funct...

...ill trying things out on smaller sets.) What should I do? 1. I recall some discussion from August 2006 about the use of the biglm package. (Subject: lean and mean lm/glm?) This seems potentially very useful, but it's not clear to me how to fit a multinomial response. Can I get bigglm to fit polychotomous data? 2. Earlier, I thought I ran across an example (perhaps in V&R's MASS4 or Harrell's Regression Modeling Strategies) showing how to use glm and an appropriate family specification to perform a multinomial logistic regression, but now I cannot find the example. This is what had to...

...n be very offputting, and could lead the rabbit to return to familiar SPSS territory. Finally, friendlier error messages would also help. It took me 3 days, and opening every function I could, to work out that '...cannot find function xxx.data.frame...' meant that MICE was unable to make a polychotomous logistic imputation model converge for the variable immediately preceding it. I am now off to the help files and FAQs to find out how to change graph parameters, as the plot.mids function in MICE a) doesn't allow one to select a subset of variables, and b) tells me that the graph it wants to...