Can anyone tell me what I might be doing incorrectly for an ordinal logistic regression for lrm? I cannot get R(2.9.1)to run either summary nor will it let me bootstrp to validate. ### Y is a 5 value measure with a range from 1-5, the independent variables are the same. N=75 but when we knock out the NAs it comes down to 51####
> lrm(formula = Y ~ permemp + rev + gconec + scorpstat, data = data, na.action = na.delete, var.penalty = "simple") ## It will give me coefficients and residuals, but nothing else really. When I try to enter "summary" it gives me this error message## > summary(bigassmall) Error in summary.Design(bigassmall) : could not find function "Varcov" ##So I thought I'd try to find a back door in, manually bootstrapping to verify then getting values that way and I get this error message## > validate(bigassmall, method=boot, B=50) Error in validate.lrm(bigassmall, method = boot, B = 50) : fit did not use x=T,y=T ######################################################## Any clue as to what I'm doing wrong? any help would be much appreciated. Karl PhD Student, Political Science University of California at Irvine ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
