Displaying 1 result from an estimated 1 matches for "n4656409".
2013 Jan 24
4
Difference between R and SAS in Corcordance index in ordinal logistic regression
...e "rms" to model ordinal
> logistic regression with proportional odds. In order to assess model
> predictive ability, C concordance index is displayed and equals to 0.963.
>
> This is the code I used with the data attached
> data.csv <http://r.789695.n4.nabble.com/file/n4656409/data.csv>
> :
>
>>require(rms)
>>a<-read.csv2("/data.csv",row.names = 1,na.strings = c(""," "),dec=".")
>>lrm(DA~SJ+TJ,data=a)
>
> Logistic Regression Model
>
> lrm(formula = DA~SJ+TJ, data = a)
>
> Frequ...