ggplot2 PREMIUM
Build layered publication-quality graphics. · Difficulty 3/5
Skill trials
Challenge your R skills.
Build deeper reasoning, debugging ability and professional coding habits.
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CRD and RCBD: From Design to Data PREMIUM
Understand experimental units, treatments, replication, randomisation and blocking before analysing a field trial. · Difficulty 3/5
dplyr & Tidy Data PREMIUM
Express transformations as readable pipelines. · Difficulty 3/5
Statistical Analysis PREMIUM
Fit and interpret models responsibly. · Difficulty 3/5
Apply Family PREMIUM
Apply functions across collections. · Difficulty 3/5
Package Development PREMIUM
Organise reusable, tested and documented R code. · Difficulty 3/5
ANOVA and Treatment Comparison PREMIUM
Use ANOVA, inspect assumptions and compare treatment means responsibly. · Difficulty 4/5
Factorial Experiments and Interaction PREMIUM
Separate main effects from interaction and explain a factorial experiment correctly. · Difficulty 4/5
Professional Functions PREMIUM
Validate inputs and communicate failures. · Difficulty 4/5
Regression and Agronomic Response PREMIUM
Fit an input-response model, make valid predictions and distinguish biological from economic optima. · Difficulty 4/5
Object-Oriented R PREMIUM
Create S3 classes and methods. · Difficulty 4/5
Error Handling PREMIUM
Recover gracefully from expected failures. · Difficulty 4/5
Reproducible Agricultural Reports PREMIUM
Create a traceable workflow that another researcher can run and verify. · Difficulty 4/5
Environments & Scope PREMIUM
Understand where R resolves names. · Difficulty 4/5
PCA and Genotype Clustering PREMIUM
Standardise several traits and interpret PCA scores, loadings and genotype groups carefully. · Difficulty 5/5