R Intermediate Quiz 2

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Quiz 2
1. Which function handles regular expressions to find pattern matches?
2. How do you define a user-defined function in R?
3. Which function is used to create a sequence of evenly spaced dates?
4. Which function is used for conditional execution similar to if-else chains?
5. What is an S3 object in R?
6. Which operator is used for matrix multiplication?
7. How do you convert a character string to a date object?
8. Which function returns the column means of a matrix?
9. What does the `any()` function check?
10. Which function reads an Excel file?
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