Online_R_learning release v5

New lesson on plot assembly/composition using patchwork is added since release v5.

Online_R_learning release v4.1

Included USDA crop yield data on Lesson 2, as well as a hypothetical pest control experiment in Lesson 4.

Online_R_learning v4.0

Online_R_learning v4.0

• Replaced gather()/spread() functions with pivot_longer()/pivot_wider().
• Fixed typos and markdown formatting issues.

v3

"Online R learning" is an tutorial in Rmarkdown format for applied statistics in R, focusing on linear models.