Question

How can I access specific columns or rows in a data set in R?

Answer 1

 To access specific columns in a data set, you can use the $ operator or square brackets []. To access specific rows, you can use square brackets [] with row indices. Here's an example:

# Access a specific column by name using the $ operator
column <- my_data$column_name

# Access a specific column by name using square brackets
column <- my_data["column_name"]

# Access a specific row by index
row <- my_data[3, ]