R(27), Decision Tree
Click here to know more about Decision Tree.
We need to use the ctree() function in package named "party".
install.packages("party")
About the function ctree():
ctree(formula, data)
- formula: a symbolic description of the model to be fit. Note that symbols like : and - will not work and the tree will make use of all variables listed on the rhs of formula.
- data: a data frame containing the variables in the model.
Example
# Load the party package. It will automatically load other dependent packages.
library(party)
# Print some records from data set readingSkills.
print(head(readingSkills))
# Load the party package. It will automatically load other dependent packages.
library(party)
# Create the input data frame.
input.dat <- readingSkills[c(1:105),]
# Give the chart file a name.
png(file = "decision_tree.png")
# Create the tree.
output.tree <- ctree(
nativeSpeaker ~ age + shoeSize + score,
data = input.dat)
# Plot the tree.
plot(output.tree)
# Save the file.
dev.off()
