Representation Advanced Quiz 4
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Quiz 4
1. In R, what does the function relocate() from dplyr accomplish?
Sorts rows based on a column
Filters rows based on conditions
Moves one or more columns to a new position within a data frame
2. In spreadsheets, what is the primary function of the RANDARRAY function?
Generates a single random number
Generates an array of random numbers with specified rows, columns, and optional min/max values
Creates a random text string
3. In R, what does the function distinct() in dplyr do?
Returns unique rows of a data frame based on selected columns
Groups data by unique values
Converts character columns to factors
4. In spreadsheets, how does the TEXTSPLIT function work?
Splits text into characters only
Joins multiple text strings
Splits text into arrays based on specified delimiters into rows or columns
5. In R, what is the purpose of the function rename_with() from dplyr?
Renames only a single column by index
Applies a function to rename multiple columns programmatically
Converts all column names to lowercase
6. In spreadsheets, what does the UNIQUE function do?
Sorts data in ascending order
Filters numbers above a threshold
Returns a list of unique values from a range or array
7. In R, what is the primary use of the function case_when() from dplyr?
Creates conditional transformations for multiple cases in a single column
Merges multiple data frames
Generates random samples
8. In spreadsheets, how does the SORTBY function differ from the SORT function?
SORTBY sorts the range in place only
SORTBY sorts a range based on the values in another range, allowing multi-criteria sorting
SORTBY cannot handle dynamic arrays
9. In R, what does the function select_if() from dplyr do?
Selects columns by position
Selects columns by name
Selects columns based on a predicate function (e.g., all numeric columns)
10. In spreadsheets, what is the main advantage of combining FILTER and SORT functions together?
Allows extraction of specific data that meets criteria and sorts it dynamically without intermediate steps
Prevents formula recalculation
Limits output to a single cell
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