R Programming: read_csv() Function

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What is the main difference between read.csv() and read_csv() functions?

read.csv() creates a data frame and read_csv() creates a tibble (correct)
read.csv() is only for CSV files and read_csv() is for other file types
read.csv() creates a tibble and read_csv() creates a data frame
read.csv() is faster and read_csv() is slower

What is the purpose of the 'col_names' argument in the read_csv() function?

To specify whether the first column contains variable names (correct)
To specify the number of rows to read
To specify the path and name of the file to be imported
To specify the data type of each column

What is the default behavior of the read_csv() function when it comes to determining the data type of each column?

It guesses the data type based on the first 1000 rows (correct)
It asks the user to specify the data type
It guesses the data type based on the first 100 rows
It always assumes the data type is character

What is the purpose of the 'n_max' parameter when reading a CSV file?

To specify the maximum number of records to read (B) Signup and view all the answers

What is the purpose of the 'na' argument in the read_csv() function?

To specify the character vector of strings used for missing values (A) Signup and view all the answers

Which function is used to read fixed-width files?

read_fwf() (C) Signup and view all the answers

What is the purpose of the 'comment' argument in the read_csv() function?

To specify the string used to identify comments (C) Signup and view all the answers

What is the purpose of the 'parse_number()' function?

To ignore non-numeric characters before and after the number (A) Signup and view all the answers

What is the advantage of using the read_csv() function over the read.csv() function?

It is typically much faster than read.csv() (A) Signup and view all the answers

What format does the 'parse_datetime()' function expect for date-time values?

ISO8601 (B) Signup and view all the answers

What is the default type of column when reading a CSV file with string values?

Character vector (D) Signup and view all the answers

What is the purpose of the 'parse_factor()' function?

To create factors with custom levels and order (A) Signup and view all the answers

What is the primary function of the readxl package?

To read xls and xlsx files (B) Signup and view all the answers

What is the main characteristic of a tidy data?

Each variable has its own column, each observation has its own row, and each value has its own cell (B) Signup and view all the answers

What is the purpose of the gather() function in the tidyr package?

To gather values into a single column (B) Signup and view all the answers

What is the default data type for gathered names in the gather() function?

Character (B) Signup and view all the answers

What is the purpose of the haven package?

To read SPSS, Stata, and SAS files (D) Signup and view all the answers

What is the term for the process of rearranging data into a consistent and useful format?

Tidying data (A) Signup and view all the answers