ipbridging Package

Authors

Tzu-Ping Liu (UC Davis)
Gento Kato (UC Davis)
Sam Fuller (UC Davis)

Description

Bridging Ideal Point Estimates. This package provides parametric and non-parametric methods to bridge ideal point estimates generated from two separate data sets. The package website is published HERE.

Installation

1. Insall oc package

CAUTION! As of January 2020, one of the dependencies, oc package is archived from CRAN. If you don’t already have oc package, you can install the latest version of archived oc package using following codes:

install.packages(“https://cran.r-project.org/src/contrib/Archive/oc/oc_1.01.tar.gz”, repos=NULL, type=“source”)

Alternatively, you could install oc package from github CRAN mirror:

devtools::install_github(“cran/oc”)

2. Install ooc package

CAUTION! May need the first line to avoid error in installation due to warnings.

Sys.setenv(R_REMOTES_NO_ERRORS_FROM_WARNINGS=TRUE)
devtools::install_github(“tzuliu/ooc”)

3. Install ipbridging package

After successfully installing oc and ooc package, you can install the ipbridging package by:

Sys.setenv(R_REMOTES_NO_ERRORS_FROM_WARNINGS=TRUE)
devtools::install_github(“gentok/ipbridging”)

Main Functions

  • ipbridging: The main function from this package. It implements various methods to bridge ideal point estimates generated from two data sets.
  • ipest: The toolbox function to compute ideal points through various methods, including, but not limited to OC (Optimal Classification), OOC (Ordered Optimal Classification), W-NOMINATE, Bayesian IRT, and Blackbox scaling.
  • oocflex: The implementation of Ordered Optimal Classification (OOC) with flexible estimation strategies. This function is the modified version of ooc function in ooc package.

Major Sub Functions

  • setanchors: This function selects anchor cases from two separate datasets, and prepare two datasets that contain anchors. Used in the part of ipbridging.
  • bridge.linearmap: The implementation of ideal points bridging through linear transformation methods. Used in the part of ipbridging.

Updates Log

  • 03/28/2020 Version 0.0.12 (beta version 13)
  • 03/27/2020 Version 0.0.11 (beta version 12)
  • 03/23/2020 Version 0.0.10 (beta version 11)
  • 03/22/2020 Version 0.0.09 (beta version 10)
  • 03/19/2020 Version 0.0.08 (beta version 9: Made Significant Changes)
  • 03/12/2020 Version 0.0.07 (beta version 8: Made Significant Changes)
  • 02/03/2020 Version 0.0.06 (beta version 7)
  • 01/29/2020 Version 0.0.05 (beta version 6)
  • 01/29/2020 Version 0.0.04 (beta version 5)
  • 01/22/2020 Version 0.0.03 (beta version 4)
  • 01/21/2020 Version 0.0.02 (beta version 3)
  • 01/20/2020 Version 0.0.01 (beta version 2)
  • 01/19/2020 Version 0.0.00 (beta version) released