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I am trying to find the number of functions in each installed R package, specifically package ggplot2, dplyr , MASS, ISwR, babynames. However, the last two packages mentioned shows 0 as output when I try to run the below code.

I have tried this in R studio 

NROW(lsf.str("package:MASS"))

NROW(lsf.str("package:ggplot2"))

NROW(lsf.str("package:dplyr"))

NROW(lsf.str("package:ISwR"))

NROW(lsf.str("package:babynames"))

I just want to know if a package can exist without any functions in it.

Maurits Evers
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pavithra anbalagan
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    `babynames` and `ISwR` are "data-only" packages. – Maurits Evers Sep 09 '19 at 06:07
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    I am afraid your question is already answered https://stackoverflow.com/questions/20535247/how-to-find-all-functions-in-an-r-package – Iman Sep 09 '19 at 06:09
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    Possible duplicate of [How to find all functions in an R package?](https://stackoverflow.com/questions/20535247/how-to-find-all-functions-in-an-r-package) – Iman Sep 09 '19 at 06:10
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    Yes, there is no requirement for a package to contain functions. – Roland Sep 09 '19 at 06:12

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