data wrangling mini course - intro

.R

# install package in R
install.packages("dplyr")
library(dplyr)

# useful functions to analyze dataframe
# review dataframe structure
glimpse(mtcars)

# print first six and last six rows
head(mtcars)
tail(mtcars)

# summarise key statistics of dataframe
summary(mtcars)

# number of rows in dataframe
nrow(mtcars)

# print column names
names(mtcars) 

# basic statistics with dataframe
mean(mtcars$mpg)
median(mtcars$mpg)
max(mtcars$mpg)
min(mtcars$mpg)
sd(mtcars$mpg)