Session 4a: Introduction to R (using RStudio)

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The video covers the following topics:
- An introduction to R and RStudio
- Setting your working directory
- Installing packages
- Some R language conventions
- Sequence generation and replication
- Variable types and conversion
- Data structures and conversion
- Vector arithmatic
- Identifying unique values
- Array sizes
- String concatenation and splitting
- Conditional logic and functions
- Reading from and writing to files
- Subscripting and subsetting
- Merging and appending data
- Sorting data
- Date and time data handling
- Tablulation
- Loops (if and while)
- User defined functions