# Political Science Computational Laboratory, Stanford University

## Documentation for package ‘pscl’ version 1.4.9

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

absentee | Absentee and Machine Ballots in Pennsylvania State Senate Races
admit | Applications to a Political Science PhD Program
AustralianElectionPolling | Political opinion polls in Australia, 2004-07
AustralianElections | elections to Australian House of Representatives, 1949-2007
betaHPD | compute and optionally plot beta HDRs
bioChemists | article production by graduate students in biochemistry Ph.D. programs
ca2006 | California Congressional Districts in 2006
coef.hurdle | Methods for hurdle Objects
coef.zeroinfl | Methods for zeroinfl Objects
computeMargins | add information about voting outcomes to a rollcall object
constrain.items | constrain item parameters in analysis of roll call data
constrain.legis | constrain legislators' ideal points in analysis of roll call data
convertCodes | convert entries in a rollcall matrix to binary form
densigamma | inverse-Gamma distribution
dropRollCall | drop user-specified elements from a rollcall object
dropUnanimous | drop unanimous votes from rollcall objects and matrices
EfronMorris | Batting Averages for 18 major league baseball players, 1970
extractAIC.hurdle | Methods for hurdle Objects
extractAIC.zeroinfl | Methods for zeroinfl Objects
extractRollCallObject | return the roll call object used in fitting an ideal model
fitted.hurdle | Methods for hurdle Objects
fitted.zeroinfl | Methods for zeroinfl Objects
hitmiss | Table of Actual Outcomes against Predicted Outcomes for discrete data models
hitmiss.glm | Table of Actual Outcomes against Predicted Outcomes for discrete data models
hurdle | Hurdle Models for Count Data Regression
hurdle.control | Control Parameters for Hurdle Count Data Regression
hurdletest | Testing for the Presence of a Zero Hurdle
ideal | analysis of educational testing data and roll call data with IRT models, via Markov chain Monte Carlo methods
idealToMCMC | convert an object of class ideal to a coda MCMC object
igamma | inverse-Gamma distribution
igammaHDR | inverse-Gamma distribution
iraqVote | U.S. Senate vote on the use of force against Iraq, 2002.
logLik.hurdle | Methods for hurdle Objects
logLik.zeroinfl | Methods for zeroinfl Objects
model.matrix.hurdle | Methods for hurdle Objects
model.matrix.zeroinfl | Methods for zeroinfl Objects
nj07 | rollcall object, National Journal key votes of 2007
ntable | nicely formatted tables
odTest | likelihood ratio test for over-dispersion in count data
partycodes | political parties appearing in the U.S. Congress
pigamma | inverse-Gamma distribution
plot.ideal | plots an ideal object
plot.predict.ideal | plot methods for predictions from ideal objects
plot.seatsVotes | plot seats-votes curves
plot1d | plots an ideal object
plot2d | plots an ideal object
politicalInformation | Interviewer ratings of respondent levels of political information
postProcess | remap MCMC output via affine transformations
pR2 | compute various pseudo-R2 measures
predict.hurdle | Methods for hurdle Objects
predict.ideal | predicted probabilities from an ideal object
predict.zeroinfl | Methods for zeroinfl Objects
predprob | compute predicted probabilities from fitted models
predprob.glm | Predicted Probabilties for GLM Fits
predprob.hurdle | Methods for hurdle Objects
predprob.ideal | predicted probabilities from fitting ideal to rollcall data
predprob.zeroinfl | Methods for zeroinfl Objects
presidentialElections | elections for U.S. President, 1932-2012, by state
print.hurdle | Hurdle Models for Count Data Regression
print.predict.ideal | predicted probabilities from an ideal object
print.summary.hurdle | Methods for hurdle Objects
print.summary.rollcall | summarize a rollcall object
print.summary.zeroinfl | Methods for zeroinfl Objects
print.zeroinfl | Zero-inflated Count Data Regression
prussian | Prussian army horse kick data
qigamma | inverse-Gamma distribution
readKH | read roll call data in Poole-Rosenthal KH format
residuals.hurdle | Methods for hurdle Objects
residuals.zeroinfl | Methods for zeroinfl Objects
rigamma | inverse-Gamma distribution
RockTheVote | Voter turnout experiment, using Rock The Vote ads
rollcall | create an object of class rollcall
s109 | rollcall object, 109th U.S. Senate (2005-06).
sc9497 | votes from the United States Supreme Court, from 1994-1997
seatsVotes | A class for creating seats-votes curves
simpi | Monte Carlo estimate of pi (3.14159265...)
state.info | information about the American states needed for U.S. Congress
summary.hurdle | Methods for hurdle Objects
summary.ideal | summary of an ideal object
summary.rollcall | summarize a rollcall object
summary.zeroinfl | Methods for zeroinfl Objects
terms.hurdle | Methods for hurdle Objects
terms.zeroinfl | Methods for zeroinfl Objects
tracex | trace plot of MCMC iterates, posterior density of legislators' ideal points
UKHouseOfCommons | 1992 United Kingdom electoral returns
unionDensity | cross national rates of trade union density
vcov.hurdle | Methods for hurdle Objects
vcov.zeroinfl | Methods for zeroinfl Objects
vectorRepresentation | convert roll call matrix to series of vectors
vote92 | Reports of voting in the 1992 U.S. Presidential election.
vuong | Vuong's non-nested hypothesis test
zeroinfl | Zero-inflated Count Data Regression
zeroinfl.control | Control Parameters for Zero-inflated Count Data Regression