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NPCD  

Nonparametric Methods for Cognitive Diagnosis
View on CRAN: Click here


Download and install NPCD package within the R console
Install from CRAN:
install.packages("NPCD")

Install from Github:
library("remotes")
install_github("cran/NPCD")

Install by package version:
library("remotes")
install_version("NPCD", "1.0-11")



Attach the package and use:
library("NPCD")
Maintained by
Yi Zheng
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2012-12-22
Latest Update: 2019-11-15
Description:
An array of nonparametric and parametric estimation methods for cognitive diagnostic models, including nonparametric classification of examinee attribute profiles, joint maximum likelihood estimation (JMLE) of examinee attribute profiles and item parameters, and nonparametric refinement of the Q-matrix, as well as conditional maximum likelihood estimation (CMLE) of examinee attribute profiles given item parameters and CMLE of item parameters given examinee attribute profiles. Currently the nonparametric methods in the package support both conjunctive and disjunctive models, and the parametric methods in the package support the DINA model, the DINO model, the NIDA model, the G-NIDA model, and the R-RUM model.
How to cite:
Yi Zheng (2012). NPCD: Nonparametric Methods for Cognitive Diagnosis. R package version 1.0-11, https://cran.r-project.org/web/packages/NPCD. Accessed 15 Jul. 2026.
Previous versions and publish date:
1.0-0 (2012-12-22 07:39), 1.0-1 (2013-02-05 05:45), 1.0-2 (2013-04-05 01:11), 1.0-3 (2013-05-30 08:27), 1.0-4 (2013-07-26 01:51), 1.0-5 (2014-02-13 07:21), 1.0-6 (2014-05-02 22:32), 1.0-7 (2014-12-03 17:22), 1.0-8 (2015-05-02 09:27), 1.0-9 (2015-10-03 19:41), 1.0-10 (2016-10-18 22:59), (2026-07-09 08:15)
Other packages that cited NPCD R package
View NPCD citation profile
Other R packages that NPCD depends, imports, suggests or enhances
Complete documentation for NPCD
Functions, R codes and Examples using the NPCD R package
Some associated functions: AlphaMLE . AlphaNP . CDL . CDP . Data.DINA . Data.DINO . Data.Qrefine . ItemFit . JMLE . ModelFit . NPCD . ParMLE . Qrefine . plot.NPCD . print.NPCD . 
Some associated R codes: AlphaMLE.R . AlphaNP.R . AlphaPermute.R . CDL.R . CDP.R . CheckInput.R . ItemFit.R . JMLE.R . ModelFit.R . ParMLE.R . Qrefine.R . plot.NPCD.R . print.NPCD.R .  Full NPCD package functions and examples
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