Fitting GRSM ( a.k.a RS-GRM)
GRSM(Graded Rating Scale Model) or also-unknown-as RS-GRM(Rating Scale-Graded Response Model) can be fitted by only a couple of softwares. I implemented the fitting in R package mirt(Chalmers, 2012). You can set itemtype="grsmIRT" for it. The only tricky thing that remains is that mirt automatically adjust the response categories so that the difference between the response categories to be 1. He..
차기작 : R을 배우자
2016. 4. 18. 00:47
long form/wide form(conceptual understanding and R implementation)
Sorry, folks. It's written in Korean. To anyone who wants to translate, You're welcomed!To anyone who wants to cooperate with me for a new R book, please leave a message.To anyone who's confused with anything about R, please let me know what they are and why you are confused.I'll try to explain as easy as possible!
차기작 : R을 배우자
2016. 4. 4. 22:31