What are the rules for naming variables in R?
- Can start with a number, Can contain special characters, Case-insensitive
- Can start with a number, Cannot contain special characters, Case-insensitive
- Cannot start with a number, Can contain special characters, Case-sensitive
- Cannot start with a number, Cannot contain special characters, Case-sensitive
Variables in R should start with a letter, and can contain letters, numbers, period (.) and underscore (_). Variable names in R are also case sensitive, so "mydata" and "MyData" would refer to different variables.
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