Concept review 6: manipulating data
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Question 1 of 5
1. Question
4. What type of data does the grep() function work with?
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Question 2 of 5
2. Question
5. Which function eliminates duplicate rows?
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Question 3 of 5
3. Question
3. Match the function to its purpose.
Sort elements
- searches for text in data
- gives you the length of any vector
- tabulates the number of entries for categorical data
- sorts data by a particular column
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grep()
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length()
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table()
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order()
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Question 4 of 5
4. Question
2. Which type of data contain sets of categories?
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Question 5 of 5
5. Question
1. Fill in the blank below.
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is a term that means only looking at a portion of the data. It is denoted in R by a ‘$’ symbol.
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