triangle.design: Construct a design for triangle tests

In SensoMineR: Sensory data analysis with R

Description

Construct a design to make triangle tests.

Usage

triangle.design (nbprod , nbpanelist, bypanelist = nbprod*(nbprod-1)/2,
   labprod=1:nbprod, labpanelist=1:nbpanelist)

Arguments

nbprod	number of products to compare
nbpanelist	number of panelists who make the triangle test
bypanelist	number of expermient that each panelist can done (by default each panelist make all the comparisons between the products
labprod	name of the products (by default, the product are coded from 1 to the number of products
labpanelist	name of the panelists (by default, the panelists are coded from 1 to the number of panelists

Details

Triangle test: panelists receive three coded samples. They are told that two of the sample are the same and one is different. Panelists are asked to identify the odd sample.

Value

Returns an data.frame of dimension (t,3), where t is the number of experiments. In column 1, 2 and 3 the product to test are given. The product in column 1 is by coded "X", in column 2 is coded by "Y" and in column 3 is coded by "Z". Panelist should start by product "X", then "Y" and then by "Z".

Author(s)

Fran<e7>ois Husson

See Also

triangle.test, triangle.pair.test

Examples

##Example 1
design1 = triangle.design (nbprod = 4, nbpanelist = 8)

##Example 2
design2 = triangle.design(nbprod = 4, nbpanelist = 6, bypanelist = 3,
  labprod=c("prod1","prod2","prod3","prod4"),
  labpanelist=c("John","Audrey","Peter","Martina","James","Lisa"))
  

Example output

Loading required package: FactoMineR

SensoMineR documentation built on May 2, 2019, 5:56 p.m.