plot.blackbt {basicspace}R Documentation

Blackbox Transpose Coordinate Distribution Plot

Description

plot.blackbt reads an blackbt object and plots the probability distribution of the respondents and stimuli.

Usage

plot.blackbt(x, xlim=c(-1,1), ...)

Arguments

x an blackbt output object.
xlim vector of length 2, fed to the plot function as the xlim argument, which sets the minimum and maximum range of the x-axis.
... other arguments to plot.

Value

A plot of the probability distribution of the respondent ideal points, along with the locations of the stimuli.

Author(s)

Keith Poole kpoole@ucsd.edu

Howard Rosenthal rosentha@princeton.edu

Jeffrey Lewis jblewis@ucla.edu

James Lo jameslo@ucla.edu

Royce Carroll rcarroll@rice.edu

See Also

'blackbox_transpose', 'LC1980', 'plotcdf.blackbt', 'summary.blackbt'.

Examples

### Loads and scales the Liberal-Conservative scales from the 1980 NES.
data(LC1980)
LCdat=LC1980[,-1]       #Dump the column of self-placements
result <- blackbox_transpose(LCdat,missing=c(0,8,9),dims=3,minscale=5,verbose=TRUE)
plot(result)
par(ask=T)
plotcdf.blackbt(result)
summary(result)
[Package basicspace version 0.01 Index]