An introduction to writing R

Lesson 1 · On the house

Hello, R

Rscript, print, cat, #, <-.

Lesson 2

Vectors

c(), types, recycling, [ indexing.

Lesson 3

Sequences and names

seq, rep, length, names, :.

Lesson 4

Matrices and data frames

matrix, data.frame, $, [, ], str, head.

Lesson 5

Factors and missing

factor, NA, is.na, na.omit.

Lesson 6

Lists and subsetting

list, [[, $, nested access.

Lesson 7

Control flow

if/else, for, while, next/break.

Lesson 8

Functions

function(), defaults, return, environments.

Lesson 9

Apply family intro

lapply, sapply, apply — when vs for.

Lesson 10

Capstone

data.frame, filter, summarize, helper, print.