Statistiek: Introductie tot R 4. The Tidyverse

			Title	Class progress
			4.1 Tidy data
			4.1.1 CO2
			4.1.2 Weight
			4.1.3 BOD
			4.2 Manipulating data frames
			4.2.1-3 Dataframe column operations
			4.2.4-6 Dataframe row operations
			4.2.7 Dataframe mixed operations
			4.3 The pipe: %>%
			4.3.1 Pipes
			4.4 Summarizing data
			4.4.1 Summarizing
			4.4.2 Grouping
			4.5 Sorting data frames
			4.5.1 Sorting
			4.6 Tibbles
			4.6.1 Tibbles 1
			4.7 The dot operator
			4.8 do
			4.9 Tidyverse conditionals
			4.9.1 Tidyverse conditionals