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_______ is not useful when developing a package since you have to install the package first.

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_______ is not useful when developing a package since you have to install the package first. (a) Function (b) Library (c) Interface (d) Class This question was posed to me in an interview. My question comes from Packages in section Commands, Packages, Visualizing Data and Linear Regression of R Programming Select the correct answer from above options

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Correct answer is (b) Library The explanation: library() is not useful when developing a package since you have to install the package first. A library is a simple directory containing installed packages.

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