R Syllabus: mid_March Update

[colinleach]

This continues from #419.

Most of the previously-written concepts have now been merged, and the majority of them also have exercises. This is very encouraging!

	Concept	Exercise
basics	✔️	✔️
booleans	✔️	✔️
conditionals	✔️	✔️
vectors	✔️	✔️
vector-filtering	✔️	✔️
vector-functions	✔️	✔️
strings	✔️	✔️
nothingness	✔️	✔️
errors	✔️
names-attribute	✔️	✔️
lists	✔️	✔️
switch	✔️	✔️
loops	✔️	✔️
set-operations	✔️	✔️
randomness	#490
complex-numbers	#390

Probably the next stage is to draft some more concept documents, to get a feel for where we're going.

• functions [Add concept] Functions #493
  • default arguments
  • named arguments
  • anonymous functions
  • scope of variables
  • copy-on-modify
• functional-programming
  • pipes
  • lapply & sapply
  • purrr
  • centrality to Tidyverse
  • recursion
• date-times [New Concept] Dates & Times - draft #500
  • limitations of base R
  • lubridate
• regular-expressions
  • back to talking about stringr
• matrices-arrays
• dataframes
  • traditional
  • tibbles
  • brief mention of data.table
  • manipulation (tidyr, dplyr, etc) may need multiple concepts
• factors
  • basics
  • forcats

At some point we need to talk about the numerous types of classes: extremely important under the hood, but you can get a long way in R while ignoring them.

And there are macros, though less central in R than in Julia, I think?