plotcdf.blackbt {basicspace}R Documentation

Blackbox Transpose Coordinate Cumulative Distribution Plot

Description

plotcdf.blackbt reads an blackbt object and plots the cumulative distribution of the respondents and stimuli.

Usage

  plotcdf.blackbt(x, align=NULL, xlim=c(-1.2,1), ...)

Arguments

x an blackbt output object.
align integer, the x-axis location that stimuli names should be aligned to If set to NULL, it will attempt to guess a location.
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 empirical cumulative 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', 'plot.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]