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List of all features on CRAN

Suppose I am trying to run a script of unknown origin, and one of the functions is from a package that the script is not loaded (supervision, it may have been loaded into .Rprofile from the person who wrote it). How can I find in which package this function is located?

There is some information compiled on a CRAN that does not require the user to download / install all R packets locally; however, as far as I could tell, it only gives access to DESCRIPTION files. RSiteSearch and its web equivalent seem to have access to an online database of all CRAN packages, where a list of all the features is likely to be available. Is there any way to access this information?

Thanks.

Edit: I know sos::findFn , utils::RSiteSearch and search.r-project ; I would like to get the raw data that these tools use.

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You can use the sos package, for example:

 library(sos) findFn("adply")

The output is html, including links to online documentation packages.

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the collidr package will give you this

 library(collidr) collidr::packages_and_functions_dataframe

It will return a list of packages and their functions from CRAN, i.e.

 # package_names function_names # 1 A3 A3-package # 2 A3 a3 # 3 A3 a3.base # 4 A3 a3.gen.default # 5 A3 a3.lm # 6 A3 a3.r2 # 7 A3 housing # 8 A3 multifunctionality # 9 A3 plot.A3 # 10 A3 plotPredictions # ... ... ... # 294181 ZVCV getX # 294182 ZVCV helper_functions # 294183 ZVCV VDP # 294184 ZVCV zvcv # 294185 ZVCV ZVCV_package # 294186 zyp confint.zyp # 294187 zyp zyp # 294188 zyp zyp.sen # 294189 zyp zyp.trend.csv # 294190 zyp zyp.trend.vector
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