I have tried using R for Just-About-Right analysis with the default data provided, but I have difficulty replacing the data with the data I have.
My data contain 6 columns (Panelists, Liking Score, Coffee Aroma, Coffee Taste, Sweetness, and Sourness) with 50 rows (panelist).
When I use my data as a data frame and following the syntax:
res.jar <- JAR("file name", col.p=6, col.j=1, col.pref=2)
The result is:
Error in relevel .default(x[, i], jarlevel):
'relevel' only for (unorder) factors
Anyone can help me? I'm new to R.