sensR (version 1.2.2)

plot.samediff: 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.

Examples

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