[R] ordered logistic regression

2007-06-07 Thread bunny , lautloscrew.com
Hi there, i tried to run an ordered logistic regression with polr. so far it worked after i turned my data into factors. but hereĀ“s my problem: my output is like this: Call: polr(formula = factor(fulltest[, 1]) ~ factor(fulltest[, 2]) + factor(fulltest[, 10]), method = "logistic") Coeffi

Re: [R] ordered logistic regression with random effects. Howto?

2007-05-08 Thread Cody_Hamilton
cc at.math.ethz.ch Subject [R] ordered logistic regression 05/07/2007 07:03

Re: [R] ordered logistic regression with random effects. Howto?

2007-05-07 Thread Prof Brian Ripley
On the definitional question, some texts do indeed consider multi-category logistic regression as a glm. But the original definition by Nelder does not. I've never seen polr considered to be a glm (but it way well have been done). Adding random effects is a whole different ball game: you need

Re: [R] ordered logistic regression with random effects. Howto?

2007-05-07 Thread Dave Atkins
Paul-- I think the options are pretty limited for mixed-effects ordinal regression; it might be worth taking a look at Laura Thompson's R/Splus companion to Alan Agresti's text on categorical data analysis: https://home.comcast.net/~lthompson221/Splusdiscrete2.pdf She discusses some options f

[R] ordered logistic regression with random effects. Howto?

2007-05-07 Thread Paul Johnson
I'd like to estimate an ordinal logistic regression with a random effect for a grouping variable. I do not find a pre-packaged algorithm for this. I've found methods glmmML (package: glmmML) and lmer (package: lme4) both work fine with dichotomous dependent variables. I'd like a model similar to

[R] Ordered Logistic Regression in survey command

2006-07-14 Thread Debarchana Ghosh
Hi, How can I do ordered logistic regression in svyglm? Thanks, D. -- Debarchana Ghosh Research Assistant Department of Geography University of Minnesota PH: 8143607580 email to: [EMAIL PROTECTED] www.tc.umn.edu/~ghos0033 __ R-help@stat.math.ethz.ch

Re: [R] Ordered logistic regression in R vs in SAS

2006-03-14 Thread Frank E Harrell Jr
Emilie Berthiaume wrote: > I tried the following ordered logistic regression in R: > > mod1 <- polr(altitude~sp + wind_dir + wind_speed + hr, data=altioot) You might also try library(Design) # also requires Hmisc package mod1 <- lrm() mod1 summary(mod1) anova(mod1) Frank Harrell > > But wh

[R] Ordered logistic regression in R vs in SAS

2006-03-14 Thread Emilie Berthiaume
I tried the following ordered logistic regression in R: mod1 <- polr(altitude~sp + wind_dir + wind_speed + hr, data=altioot) But when I asked The summary of my regression I got the folloing error message: > summary (mod1) Re-fitting to get Hessian Error in optim(start, fmin, gmin, method = "B