convertRC | R Documentation |
convertRC
takes a rollcall
object and converts it
into a format suitable for estimation with 'binIRT'.
convertRC(.rc, type = "binIRT")
.rc |
a |
type |
string, only “binIRT” is supported for now, and argument is ignored. |
An object of class rollcall
, with votes recoded such that yea=1, nay=-1, missing data = 0.
Kosuke Imai kimai@princeton.edu
James Lo jameslo@princeton.edu
Jonathan Olmsted jpolmsted@gmail.com
Kosuke Imai, James Lo, and Jonathan Olmsted “Fast Estimation of Ideal Points with Massive Data.” Working Paper. Available at http://imai.princeton.edu/research/fastideal.html.
'binIRT', 'makePriors', 'getStarts'.
## Data from 109th US Senate data(s109) ## Convert data and make starts/priors for estimation rc <- convertRC(s109) p <- makePriors(rc$n, rc$m, 1) s <- getStarts(rc$n, rc$m, 1) ## Conduct estimates lout <- binIRT(.rc = rc, .starts = s, .priors = p, .control = { list(threads = 1, verbose = FALSE, thresh = 1e-6 ) } ) ## Look at first 10 ideal point estimates lout$means$x[1:10]
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