Checkout Lesson Contribution - Improving the transition from Base R to the tidiverse

[camilavargasp]

I suggest explaining a little further about the transition from Base R to the tidiverse. Even though the lesson mentions 3 good issues that the tidyverse addresses. I think that as stated in the lesson is still confusing for learners to understand this transition.
I suggest two things in the introduction to Manipulating data section.

1. State that the tidyverse helps in the legibility of the code. This means that the code is easier to read and therefore easier to find errors or improvements to your code. This also helps with transparency and reproducibility. To make this point clear, at the end of the section I would add an exercise comparing code with base R and the tidyverse.
2. Along the same line, I suggest mentioning that the reason for switching from read.csv to read_csv is that read_csv is much faster for large csv files.

I think that small conceptual details make a big difference when learning any programming language.

[fmichonneau]

addressed with #663