Disclaimer: The content of this RMarkdown note came from a course called Introduction to R for Finance in datacamp.
What are R’s three most basic data types? Of the three, what would be decimal numbers like 3.1? Type your answer below.1.
Decimal numbers like 3.1 would be numeric.
What are R’s five most common types of objects? Type your answer below.
The 5 most common types of objects are Data Frames, Matrix, Vectors, Factors, and Lists.
Compare vectors and matrices. What are similarities and differences? Type your answer below.
A vector is a group of data that are all the same data type, while matricies are two dimensonal and data is in rows and columns.
Compare matrices and data frames. What are similarities and differences? Type your answer below.
A data frame is a grid with rows and columns while matrices are two dimeensonal but can also have rows and columns.
Create a vector, “returns”, in place of “ret”; and assign 5 return values, 1 through 5 in place of (5, 2, 3, 7, 8, 3, 5, 9, 1, 4, 6, 3). Create another vector, “days”, in place of “months”; and assign 5 days, Monday through Friday in place of (“Jan”, “Feb”, “Mar”, “Apr”, “May”, “Jun”, “Jul”, “Aug”, “Sep”, “Oct”, “Nov”, “Dec”). Then, create a data frame, “daily_returns”, in place of “monthly_returns” by combining days and returns.
## days returns
## 1 Mon 1
## 2 Tue 2
## 3 Wed 3
## 4 Thur 4
## 5 Fri 5Subset rows with daily returns greater than or equal to 4%.
## days returns
## 4 Thur 4
## 5 Fri 5