[R] IRT model nonparametric from Ramsay in R

Hi: I need to apply the IRT model from Ramsay (1991), He apply the Smoothing Kernel to multiple choice test. Is possible in R?. Thank you, Xavier G. Ordonez Doctoral Student __ R-help@stat.math.ethz.ch mailing list

[R] partial AUC and SE in R

Hi, I need to apply the Partial AUC in ROC curves. How I do this?. And I need the SE of partial AUC too. I have been reading ?caTool, ?Epi, ?verification, ?ROC, ?ROCR, ?genefilter and more. I only see the partial AUC, but I do not the SE. Thank you, if you can help me. Xavier G. Ordoñez

[R] IRT model nonparametric from Ramsay in R

Hi: I need to apply the IRT model from Ramsay (1991), He apply the Smoothing Kernel to multiple choice test. Is possible in R?. Thank you, Xavier G. Ordonez Doctoral Student Universidad Complutense de Madrid __ R-help@stat.math.ethz.ch mailing list

[R] How Aggegate Data in R

Hello: When I use SPSS I execute the AGGREGATE DATA comand for the next data: 2112141123212213212213334 3143244113442312121213344 2114141123112214212113344 2112211122212413421213221 311123442414343413344 231223122321323223322 2143241123212313131213234 21132411132123131

[R] Nominal Respose Model in R

Hi: I have been working in Item Response Theory, exactly, with Nominal Response Model (NRM). Exist in R a function for estimate parameter and ability from database for this Model?. Thank you, Xavier G. Ordóñez [[alternative HTML version deleted]]