Q. Which of the following draws plot on current graphics device?

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Q. ________ is used for relative sizing of theme elements.

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Q. _________ display contours of a 3d surface in 2d.

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Q. Point out the correct statement?

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Q. ______ display a smooth density estimate.

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Q. Which of the following draws nothing?

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Q. Point out the correct statement?

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Q. _________ describe the type of plot you will produce.

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Q. __________ is interval represented by a vertical line, with a point in the middle.

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Q. Which of the following create a set of identity mappings?

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Q. _________ is new package that makes it easy to “tidy” your data.

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Q. Point out the correct statement?

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Q. Which of the following is complementary to tidyr?

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Q. How many functions exist for tidying the data?

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Q. Point out the correct statement?

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Q. Which of the following function takes multiple columns?

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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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