Rwinsteps-package: Running Winsteps in R

In talbano/rwinsteps: Running Winsteps in R

Description

The Rwinsteps package facilitates communication between R and the Rasch modeling software Winsteps. The package currently includes functions for reading and writing command files, sending them to Winsteps, reading and writing data according to command file specifications, reading output into R, and plotting various results.

Details

Package:	Rwinsteps
Version:	1.0-1
Date:	2012-1-30
Depends:	R (>= 2.12.0)
LazyLoad:	yes
License:	GPL (>= 2)
URL:	http://www.r-project.org
Built:	R 2.13.0; ; 2011-08-30 21:02:07 UTC; windows

Index:

ifile                   Item and Person Summary Files
plot.ifile              Plotting Item Staistics
wdat                    Winsteps Data File
rirf                    Item Functions
wcmd                    Winsteps Command File
winsteps                Running Winsteps

Rasch modeling in Winsteps begins with a command file, which specifies the structure and contents of the data file and which includes options for customizing how the model is run and fit and for requesting output tables and files. A command file may be construced in R using the wcmd function, read in to R using read.wcmd, or simply referenced in the winsteps function, in which case it is still read into R but invisibly.

The winsteps function returns two of the more relevant output files, the ifile and pfile, for further manipulation and analysis in R. These can also be saved to file and they are read into R using the functions read.ifile and read.pfile, which are simple wrappers to the function read.csv. In this case, files should be saved as csv, and the default file headers should always be included.

Rwinsteps includes additional functions for obtaining the response, information, and error functions at both the test and item levels for the dichotomous Rasch model, and for plotting and comparing results. Finally, the read.wdat and write.wdat functions read and write fixed width formatted data by extracting required information from a command file.

Author(s)

Anthony Albano <[e-mail]>, Ben Babcock <[e-mail]>

Maintainer: Anthony Albano <[e-mail]>

References

Winsteps is commercial software, available at www.winsteps.com

talbano/rwinsteps documentation built on May 24, 2019, 7:31 a.m.