The dataset can be downloaded from http://archive.ics.uci.edu/ml/machine-learning-databases/wine-quality/
Getting the following error:
formula(formula, data = data) : invalid model formula in ExtractVars
Using the following code:
install.packages("rpart")
library("rpart")
# you'll need to change the following from windows to work on a linux box:
mydata <- read.csv(file="c:/Users/md7968/downloads/winequality-red.csv")
# grow tree
fit <- rpart(YouSweetBoy ~ "residual sugar" + "citric acid", method = "class", data = mydata
Mind you I’ve changed the delimiters in the CSV file to commas.
perhaps it’s not reading the data correctly. Forgive me, I’m new to R and not a very good programmer.
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