Lessons
R · Easy
R · Easy. Ten lessons. Open-book quizzes. Lesson 1 free.
10 lessons · The Host · Lesson 1 free
Pass all ten lessons for the certificate. Sample · Claim
Lesson 1 · On the house
Strings and paste
paste, paste0, sprintf, nchar, substr.
Lesson 2
Logical filters on frames
%in%, & | !, which, subset vs [.
Lesson 3
ifelse and cut
vectorized ifelse, cut bins, findInterval.
Lesson 4
Sorting and order
sort, order, rank, reorder a data.frame.
Lesson 5
Bind and merge
rbind, cbind, merge, match.
Lesson 6
Split-apply with tapply/by
tapply, by, aggregate formula.
Lesson 7
read.csv / write.csv
read.csv, write.csv, na.strings, row.names.
Lesson 8
Base plots
plot, hist, boxplot, par(mfrow), png.
Lesson 9
Packages and search
install.packages, library, search, ::.
Lesson 10
Easy capstone
CSV in/out, filter, aggregate, report.
Sample certificate
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Certificate
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