1. 1. R Programming
2. 2. R - basics
3. 1. 2.1. Background
   2. 2.2. Alternatives
   3. 2.3. Install R
   4. 2.4. Install R Studio
   5. 2.5. Launch interactive R, get help, and quit
   6. 2.6. Running R on the command line using Rscript
   7. 2.7. Comments
   8. 2.8. R and simple math operations
   9. 2.9. R variables
   10. 2.10. R assignment (left-assignment, right-assignment)
   11. 2.11. Variable types (numeric, character, logical, function)
   12. 2.12. Variable types are deducted
   13. 2.13. paste (join) strings and numbers together
   14. 2.14. Operator preference order and parentheses
   15. 2.15. Operators comparing numbers
   16. 2.16. Operators comparing strings (characters)
   17. 2.17. Convert string (character) to numeric
   18. 2.18. Boolean (logical) operations
   19. 2.19. Concatenate strings
   20. 2.20. Convert between types using as.
   21. 2.21. Printing with cat
4. 3. Vectors
5. 1. 3.1. R vectors
   2. 3.2. Variable types of vectors are deducted
   3. 3.3. One element vector is the same a single value
   4. 3.4. Sum of values in vectors
   5. 3.5. Size of vector (length of vector)
   6. 3.6. Access the n-the element of a vector
   7. 3.7. R Vector: Negative index, exclude element
   8. 3.8. R vector: Access several elements (slice)
   9. 3.9. R vector: Exclude several elements
   10. 3.10. Some basic statistical functions
   11. 3.11. 3 ways to create vectors
   12. 3.12. R - sequences and ranges
   13. 3.13. Range of numbers
   14. 3.14. Filter values
   15. 3.15. Index of true elements - which
   16. 3.16. which
   17. 3.17. Matix TBD
   18. 3.18. Vector operations - reuse values from shorter vector
   19. 3.19. Summary of numeric data
   20. 3.20. Change element of vector
   21. 3.21. Assign vector to another name
   22. 3.22. Reverse vector
   23. 3.23. Sort vector
   24. 3.24. Sort using order
   25. 3.25. Operators comparing vectors
   26. 3.26. Convert vector of strings to numerics
   27. 3.27. Repeate the same number
   28. 3.28. Boolean (logical) operations on vectors
   29. 3.29. Factors
   30. 3.30. Append to end of vector
6. 4. Data Frames
7. 1. 4.1. Data Frame functions
   2. 4.2. Iris dataset
   3. 4.3. Built-in Iris data set
   4. 4.4. Load Iris dataset
   5. 4.5. Sort dataset by a column
   6. 4.6. Order dataframe by two columns (secondary sort)
8. 5. Strings (characters)
9. 1. 5.1. Substitute first occurence using sub
   2. 5.2. Substitute all occurences using gsub
10. 6. Functions
11. 1. 6.1. Functions overview
    2. 6.2. Simple add function
    3. 6.3. Recursive Fibonacci
    4. 6.4. Fibonacci
12. 7. Testing
13. 1. 7.1. Testthat
    2. 7.2. Test Example
14. 8. Files
15. 1. 8.1. Filesystem pathes
    2. 8.2. Filesystem get current working directory (cwd)
    3. 8.3. Concatenate pathes
    4. 8.4. Change directory
    5. 8.5. Recursively list files and directories
    6. 8.6. Write to a textfile
    7. 8.7. Read a textfile
    8. 8.8. Counter with file storage
16. 9. Graphs
17. 1. 9.1. Bar plot
    2. 9.2. Associate name with each value
    3. 9.3. Quick graphs
    4. 9.4. Random numbers in normal distribution
18. 10. Packages
19. 1. 10.1. CRAN
    2. 10.2. Install CRAN packages
    3. 10.3. Install CRAN packages from the command line
    4. 10.4. Install several CRAN packages from the command line
    5. 10.5. Read CSV file
    6. 10.6. Read JSON file
20. 11. Other
21. 1. 11.1. Exit - quit
    2. 11.2. Script name
    3. 11.3. Command line arguments
    4. 11.4. if-statement
    5. 11.5. for loop