• Character: Single character or string
• Numeric: All types of numbers (including floating point). Automatically converted by R to appropriate sub-types.
• Integer: Full Integers, no automatic conversion
• Logical: TRUE/FALSE
• Complex: Allows the use of complex arithmetic / imaginary numbers e.g. 2+3i
• Raw: Stores data as raw bytes. Displayed as HEX when printed.
• Function: Callable R functions.