R Programming · Lessons

R Programming lessons

12 sections · 95 skills · work through the full outline skill by skill — read the long-form lesson or flip through the slide-style version.

Long-form lessonsSlide-style lessons

Practice 95 skills across this outline.

Recommended next

Working Directory & Paths

Getting Started and Tooling · R Environment and Project Setup

Long-form lesson

Weighting distribution

25 categories

Functions and Program Structure · Modularity and Scripting

Algorithms and Complexity

Debugging and Testing · Testing Basics

Control Flow · Loops

Input and Output

Getting Started and Tooling · Version Control Basics

Skills

The comprehensive taxonomy of r programming — drill into a card to work its skills.

Getting Started and Tooling · R Environment and Project Setup

5 core skills3% total weight

0/5 completed

5 skills to mastery

Working Directory & PathsRecommended

Long-form

Installing & Loading PackagesAvailable

Long-form

Running R CodeAvailable

Long-form

R MarkdownAvailable

Long-form

RStudio BasicsAvailable

Long-form

Getting Started and Tooling · Version Control Basics

3 core skills6% total weight

0/3 completed

3 skills to mastery

Resolving Merge ConflictsAvailable

Long-form

Using .gitignoreAvailable

Long-form

Git CommitsAvailable

Long-form

Functions and Program Structure · Defining and Calling Functions

5 core skills0% total weight

0/5 completed

5 skills to mastery

Function DocumentationAvailable

Long-form

Default & Named ArgumentsAvailable

Long-form

Scoping & EnvironmentsAvailable

Long-form

Vectorized FunctionsAvailable

Long-form

Defining FunctionsAvailable

Long-form

Functions and Program Structure · Modularity and Scripting

4 core skills8% total weight

0/4 completed

4 skills to mastery

Package StructureAvailable

Long-form

Code OrganizationAvailable

Long-form

Avoiding Global StateAvailable

Long-form

source()Available

Long-form

Software Craft and Communication · Readability and Style

4 core skills4% total weight

0/4 completed

4 skills to mastery

Naming & FormattingAvailable

Long-form

RefactoringAvailable

Long-form

Readable PipelinesAvailable

Long-form

Style ConventionsAvailable

Long-form

Software Craft and Communication · Problem Decomposition and Explanation

3 core skills4% total weight

0/3 completed

3 skills to mastery

Communicating LimitationsAvailable

Long-form

Explaining Analysis StepsAvailable

Long-form

Stating AssumptionsAvailable

Long-form

Algorithms and Complexity

3 core skills8% total weight

0/3 completed

3 skills to mastery

Vectorization PerformanceAvailable

Long-form

apply-Family FunctionsAvailable

Long-form

Performance PitfallsAvailable

Long-form

Data Structures in R · Lists and Matrices

4 core skills0% total weight

0/4 completed

4 skills to mastery

apply/lapply/sapplyAvailable

Long-form

Converting Data StructuresAvailable

Long-form

MatricesAvailable

Long-form

ListsAvailable

Long-form

Data Structures in R · Data Frames and Tibbles

4 core skills3% total weight

0/4 completed

4 skills to mastery

Subsetting Data FramesAvailable

FactorsAvailable

TibblesAvailable

Data FramesAvailable

Data Structures in R · Vectors and Indexing

4 core skills5% total weight

0/4 completed

4 skills to mastery

Vector IndexingAvailable

Long-form

Handling NA ValuesAvailable

Long-form

which() & Logical SubsettingAvailable

Long-form

Creating VectorsAvailable

Long-form

Syntax and Core Types · Operators and Expressions

5 core skills5% total weight

0/5 completed

5 skills to mastery

Comparison & Logical OperatorsAvailable

Long-form

%in% OperatorAvailable

Long-form

Arithmetic Operators & PrecedenceAvailable

Long-form

Vectorized vs. Short-Circuit OperatorsAvailable

Long-form

ifelse()Available

Long-form

Syntax and Core Types · Atomic Types and Coercion

4 core skills0% total weight

0/4 completed

4 skills to mastery

Type ConversionAvailable

Long-form

NA, NaN & InfAvailable

Long-form

Type CoercionAvailable

Long-form

R Data TypesAvailable

Long-form

Syntax and Core Types · Variables and Assignment

4 core skills4% total weight

0/4 completed

4 skills to mastery

Variable Assignment (<- vs. =)Available

Long-form

Naming ConventionsAvailable

Long-form

Immutability vs. ReassignmentAvailable

Long-form

Vectorized OperationsAvailable

Long-form

R-Specific Topics (Statistical Computing) · Simulation and Randomness

3 core skills3% total weight

0/3 completed

3 skills to mastery

set.seed() for ReproducibilityAvailable

Long-form

Random SamplingAvailable

Long-form

Simulation & VariabilityAvailable

Long-form

R-Specific Topics (Statistical Computing) · Modeling and Formula Syntax

4 core skills5% total weight

0/4 completed

4 skills to mastery

Formula SyntaxAvailable

Long-form

Logistic Regression (glm)Available

Long-form

Linear Models (lm)Available

Long-form

Extracting Model OutputsAvailable

Long-form

R-Specific Topics (Data Workflows) · Data Manipulation with dplyr

5 core skills3% total weight

0/5 completed

5 skills to mastery

filter()Available

Long-form

mutate() & RecodingAvailable

Long-form

Joining Data FramesAvailable

Long-form

select() & rename()Available

Long-form

group_by() & summarize()Available

Long-form

R-Specific Topics (Data Workflows) · Data Visualization with ggplot3

4 core skills3% total weight

0/4 completed

4 skills to mastery

Building ggplotsAvailable

Long-form

Customizing ggplotAvailable

Long-form

FacetingAvailable

Long-form

Creating Common PlotsAvailable

Long-form

R-Specific Topics (Data Workflows) · Reshaping with tidyr

3 core skills2% total weight

0/3 completed

3 skills to mastery

separate() & unite()Available

Long-form

Handling Missing Values in ReshapingAvailable

Long-form

pivot_longer() & pivot_wider()Available

Long-form

Text and Dates · Strings and Text Processing

3 core skills5% total weight

0/3 completed

3 skills to mastery

Basic String FunctionsAvailable

Long-form

Cleaning Text DataAvailable

Long-form

Regular ExpressionsAvailable

Long-form

Text and Dates · Dates and Times

3 core skills3% total weight

0/3 completed

3 skills to mastery

Parsing Dates & Time ZonesAvailable

Long-form

lubridate FunctionsAvailable

Long-form

Date/POSIXct ObjectsAvailable

Long-form

Debugging and Testing · Debugging Workflow

4 core skills0% total weight

0/4 completed

4 skills to mastery

browser() & debug()Available

Long-form

Errors, Warnings & MessagesAvailable

Long-form

print() & str()Available

Long-form

traceback()Available

Long-form

Debugging and Testing · Testing Basics

3 core skills8% total weight

0/3 completed

3 skills to mastery

testthatAvailable

Long-form

stopifnot() & AssertionsAvailable

Long-form

Testing with Edge CasesAvailable

Long-form

Control Flow · Conditionals

3 core skills0% total weight

0/3 completed

3 skills to mastery

If/Else & Else-If ChainsAvailable

Long-form

switch()Available

Long-form

Nested ConditionalsAvailable

Long-form

Control Flow · Loops

4 core skills8% total weight

0/4 completed

4 skills to mastery

next & breakAvailable

Long-form

While LoopsAvailable

Long-form

For LoopsAvailable

Long-form

Vectorization vs. LoopsAvailable

Long-form

Input and Output

4 core skills8% total weight

0/4 completed

4 skills to mastery

RDS FilesAvailable

Long-form

Writing CSV FilesAvailable

Long-form

Reading Excel FilesAvailable

Long-form

Reading CSV FilesAvailable

Long-form