R Programming Fundamentals

Activity: Demonstrating Splitting and Combining Data

1. Load the mtcars dataset using the following code:

install.packages("datasets")library(datasets)data("mtcars")

Split the data by the cyl variable as follows:

mtcars_split <- split(mtcars, mtcars$cyl)

Create one dataset for each level of cyl using the following code:

mtcars_4 <- mtcars_split[[1]]mtcars_6 <- mtcars_split[[2]]mtcars_8 <- mtcars_split[[3]]

Recreate mtcars by unsplitting the split version of the data as follows:

mtcars_unsplit <- unsplit(mtcars_split, mtcars$cyl)

2. Combine the data using the following code:

l1 <- letters[1:4]l2 <- letters[5:8]l3 <- letters[9:12]l4 <- letters[13:16]l5 <- letters[17:20]

Create the following datasets letters1 and letters2 as follows:

letters1 ...