Q. __________ uses regex groups instead of a splitting pattern or position.

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Q. Which of the following function works similar to separate()?

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Q. Which of the following takes two columns and spreads them into multiple columns?

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Q. __________ is used when you have variables that form rows instead of columns.

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Q. Point out the correct statement?

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Q. Which of the following merges two variables into one?

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Q. How many functions exist for wrangling the data with dplyr package?

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Q. Point out the correct statement?

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Q. _________ extract a subset of rows from a data frame based on logical conditions.

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Q. Spread function is known as ___________ in spreadsheets.

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Q. Which of the following is a principle of analytic graphics?

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Q. What is the role of exploratory graphs in data analysis?

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Q. Which of the following is true about the base plotting system?

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Q. Which of the following is an example of a valid graphics device in R?

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Q. Which of the following is an example of a vector graphics device in R?

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Q. Bitmapped file formats can be most useful for ____________

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Q. Which of the following functions is typically used to add elements to a plot in the base graphics system?

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Q. Which function opens the screen graphics device for the Mac?

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Q. What does the ‘pch’ option to par() control?

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Q. If I want to save a plot to a PDF file, which of the following is a correct way of doing that?

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