R Code Basics

Question 1

Help() or ?

Answer 1

Provides help documentation for a function or topic.

help(“tidyverse”)
?mean

Question 2

data()

Answer 2

Loads built-in datasets.
data(trees)

Question 3

str()

Answer 3

displays the structure of an R object.

str(trees)

Question 4

head()

Answer 4

shows initial rows of data
head(trees)

Question 5

summary()

Answer 5

Generates summary statistics
summary(trees)

Question 6

cor()

Answer 6

computes correlation coeffcients

cor(trees)

Question 7

hist()

Answer 7

plots histograms
hist(trees$Height)

Question 8

plots()

Answer 8

Creates various types of plots
plots(trees)

Question 9

lm()

Answer 9

Fits a linear regression model.
im(Volume ~ Height, data = trees)

Question 10

c()

Answer 10

Combines arguments into a vector.

c(1, 8, 2024, 12, 15)
c(“Maple”, “Oak”, “Pine”)