R Graphical Manual

Last data update: 2014.03.03

Data Source

R Release (3.2.3)
CranContrib
BioConductor
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Classification

Results 1 - 10 of 112 found.
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btm (Package: sirt) :

Estimates an extended Bradley-Terry model (Hunter, 2004; see Details).

● Data Source: CranContrib
● Keywords: Bradley-Terry model, summary
● Alias: btm, summary.btm
● 0 images

lc.2raters (Package: sirt) :

This function computes a latent class model for ratings on an item based on exchangeable raters (Uebersax & Grove, 1990). Additionally, several measures of rater agreement are computed (see e.g. Gwet, 2010).

● Data Source: CranContrib
● Keywords: Latent class model, Rater model, summary
● Alias: lc.2raters, summary.lc.2raters
● 0 images

ccov.np (Package: sirt) :

This function estimates conditional covariances of itempairs (Stout, Habing, Douglas & Kim, 1996; Zhang & Stout, 1999a). The function is used for the estimation of the DETECT index.

● Data Source: CranContrib
● Keywords: DETECT
● Alias: ccov.np
● 0 images

dif.logistic.regression (Package: sirt) :

This function estimates differential item functioning using a logistic regression analysis (Zumbo, 1999).

● Data Source: CranContrib
● Keywords: Differential item functioning (DIF)
● Alias: dif.logistic.regression
● 0 images

mcmc.3pno.testlet (Package: sirt) :

This function estimates the 3PNO testlet model (Wang, Bradlow & Wainer, 2002, 2007) by Markov Chain Monte Carlo methods (Glas, 2012).

● Data Source: CranContrib
● Keywords: Markov Chain Monte Carlo (MCMC), Testlet model, Testlets
● Alias: mcmc.3pno.testlet
● 0 images

gom.jml (Package: sirt) :

This function estimates the grade of membership model employing a joint maximum likelihood estimation method (Erosheva, 2002; p. 23ff.).

● Data Source: CranContrib
● Keywords: Grade of membership model
● Alias: gom.jml
● 0 images

rinvgamma2 (Package: sirt) :

Random draws and density of inverse gamma distribution parametrized in prior sample size n0 and prior variance var0 (see Gelman et al., 2014).

● Data Source: CranContrib
● Keywords:
● Alias: dinvgamma2, rinvgamma2
● 0 images

categorize (Package: sirt) :

The function categorize defines categories for variables in a data frame, starting with a user-defined index (e.g. 0 or 1). Continuous variables can be categorized by defining categories by discretizing the variables in different quantile groups.

● Data Source: CranContrib
● Keywords: Utilities
● Alias: categorize, decategorize
● 0 images

dirichlet.simul (Package: sirt) :

This function makes random draws from a Dirichlet distribution.

● Data Source: CranContrib
● Keywords: Dirichlet distribution
● Alias: dirichlet.simul
● 0 images

rasch.jml.biascorr (Package: sirt) :

This function computes an analytical bias correction for the Rasch model according to the method of Arellano and Hahn (2007).

● Data Source: CranContrib
● Keywords: Joint maximum likelihood (JML)
● Alias: rasch.jml.biascorr
● 0 images