basicspace (version 0.13)

LC1980_bbt: Blackbox Transpose Estimate, 1980 Liberal-Conservative Scales.

Description

Blackbox-Transpose estimats from Liberal-Conservative 7-point scales from the 1980 National Election Study. Estimates in 3 dimensions.

Usage

data(LC1980_bbt)

Value

• An object of class blackbt.
• stimuli
  vector of data frames of length dims. Each data frame presents results for estimates from that dimension (i.e. x$stimuli[[2]] presents results for dimension 2). Each row contains data on a separate stimulus, and each data frame includes the following variables:

  • N

  {Number of respondents who ranked this stimulus.} coord1D{Location of the stimulus in the first dimension. If viewing the results for a higher dimension, higher dimension results will appear as coord2D, coord3D, etc.} R2{The percent variance explained for the stimulus. This increases as more dimensions are estimated.}

item

• individuals
• w1
• R2
• fits
• SSE.explained
• percent
• SE
• singular
• Nrow
• Ncol
• Ndata
• Nmiss
• SS_mean
• dims

itemize

• SSE

source

American national Election Study. http://www.electionstudies.org/ Also availble from Keith Poole. http://voteview.edu/aldmck.htm

See Also

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

Examples

### Loads and scales the Liberal-Conservative scales from the 1980 NES.
data(LC1980)
LCdat=LC1980[,-1]	#Dump the column of self-placements

### This command conducts estimates, which we instead load using data()
#LC1980_bbt <- blackbox_transpose(LCdat,missing=c(0,8,9),dims=3,minscale=5,verbose=TRUE)
data(LC1980_bbt)

plot(LC1980_bbt)
par(ask=TRUE)
plotcdf.blackbt(LC1980_bbt)
summary(LC1980_bbt)