plot.samediff: Plot function for samediff objects

In sensR: Thurstonian Models for Sensory Discrimination

Plot function for samediff objects

Description

This function plots the latent distributions of sensory intensity corresponding to the items or products tested in the discrimination test.

Usage

## S3 method for class 'samediff'
plot(x, main = TRUE, length = 1000,
           limits, fig = TRUE, ...)

Arguments

x	The samediff object whose latent distributions are to be plotted
main	include an automatically generated title on the plot? Default is TRUE
length	the length of the vectors to be plotted. Longer vectors gives more smooth curves, but can take a little time.
limits	optional limits on the x-axis; vector of length two.
fig	logical: Should the function create the plot? Defaults to TRUE.
...	additional arguments to plot and lines

Value

If fig = TRUE, the function will produce the plot. The function invisibly returns a data.frame with elements

z	values for the x-axis of lenght length.
base.dist	y-values for the base distribution of same-samples, ie. a standard normal distribution
delta.dist	y-values for the distribution of different-samples, ie. a normal distribution centred at delta with unit variance.

This facilitates later plotting and changing the appearance of the plot.

Author(s)

Rune Haubo B Christensen

Examples

## Make same-diff object:
sadi <- samediff(8, 5, 4, 9)
## Plot distributions of sensory intensity:
plot(sadi)

sensR documentation built on Nov. 2, 2023, 6:02 p.m.