R Graphical Manual

Last data update: 2014.03.03

Data Source

R Release (3.2.3)
CranContrib
BioConductor
All

Data Type

Packages
Functions
Images
Data set

Classification

Results 1 - 10 of 29 found.
[1] < 1 2 3 > [3] Sort:

rasch (Package: ltm) : Rasch Model

Fit the Rasch model under the Item Response Theory approach.

● Data Source: CranContrib
● Keywords: multivariate, regression
● Alias: rasch
● 0 images

gpcm (Package: ltm) : Generalized Partial Credit Model - Polytomous IRT

Fits the Generalized Partial Credit model for ordinal polytomous data, under the Item Response Theory approach.

● Data Source: CranContrib
● Keywords: multivariate, regression
● Alias: gpcm
● 0 images

biserial.cor (Package: ltm) :

Computes the point-biserial correlation between a dichotomous and a continuous variable.

● Data Source: CranContrib
● Keywords: multivariate
● Alias: biserial.cor
● 0 images

anova (Package: ltm) : Anova method for fitted IRT models

Performs a Likelihood Ratio Test between two nested IRT models.

● Data Source: CranContrib
● Keywords: methods
● Alias: anova.gpcm, anova.grm, anova.ltm, anova.rasch, anova.tpm
● 0 images

rmvlogis (Package: ltm) :

Produces Bernoulli or Multinomial random variates under the Rasch, the two-parameter logistic, the three parameter, the graded response, and the generalized partial credit models.

● Data Source: CranContrib
● Keywords: multivariate
● Alias: rmvlogis, rmvordlogis
● 0 images

person.fit (Package: ltm) : Person-Fit Statistics and P-values

Computation of person fit statistics for ltm, rasch and tpm models.

● Data Source: CranContrib
● Keywords: multivariate
● Alias: person.fit
● 0 images

information (Package: ltm) :

Computes the amount of test or item information for a fitted IRT model, in a specified range.

● Data Source: CranContrib
● Keywords: multivariate
● Alias: information
● 0 images

residuals (Package: ltm) : Residuals for IRT models

Computes the residuals for vectors of response patterns.

● Data Source: CranContrib
● Keywords: methods
● Alias: residuals.gpcm, residuals.grm, residuals.ltm, residuals.rasch, residuals.tpm
● 0 images

unidimTest (Package: ltm) : Unidimensionality Check using Modified Parallel Analysis

An empirical check for the unidimensionality assumption for ltm, rasch and tpm models.

● Data Source: CranContrib
● Keywords: multivariate
● Alias: unidimTest
● 0 images

rcor.test (Package: ltm) :

Computes and tests the pairwise associations between items using a correlation coefficient

● Data Source: CranContrib
● Keywords: multivariate
● Alias: rcor.test
● 0 images