R: Visualizing Bradley-Terry Models

plot.btmodel {psychotools} | R Documentation

## Visualizing Bradley-Terry Models

### Description

Base graphics plotting function for Bradley-Terry models.

### Usage

    ## S3 method for class 'btmodel'
    plot(x, worth = TRUE, index = TRUE, names = TRUE,
      ref = TRUE, abbreviate = FALSE, type = NULL, lty = NULL,
      xlab = "Objects", ylab = NULL, ...)

### Arguments

`x` | an object of class `"btmodel"`.
`worth` | logical. Should worth parameters (or alternatively coefficients on log-scale) be displayed?
`index` | logical. Should different indexes for different items be used?
`names` | logical. Should the names for the objects be displayed?
`ref` | logical. Should a horizontal line for the reference level be drawn?
`abbreviate` | logical or numeric. Should object names be abbreviated? If numeric this controls the length of the abbreviation.
`type` | plot type. Default is `"b"` if `index` is `TRUE`.
`lty` | line type.
`xlab, ylab` | x and y axis labels.
`...` | further arguments passed to `plot`.

### See Also

`btmodel`

### Examples

    ## data
    data("GermanParties2009", package = "psychotools")

    ## Bradley-Terry model
    bt <- btmodel(GermanParties2009$preference)
    plot(bt)
    plot(bt, worth = FALSE)
    plot(bt, index = FALSE)

[Package psychotools version 0.4-2 Index]