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non standard file "data-raw" note on building/checking a package in R

I get this warning 

Non-standard file/directory found at top level:
  ‘data-raw’

when building my package, even there is the recommendation of creating this folder to create package data http://r-pkgs.had.co.nz/data.html#data-sysdata

Any comments on that or do I need a specific setting to get rid of this message.

Solution

  • When used, data-raw should be added to .Rbuildignore. As explained in the Data section of Hadley's R-Packages book (also linked in the question)

    Often, the data you include in data/ is a cleaned up version of raw data you’ve gathered from elsewhere. I highly recommend taking the time to include the code used to do this in the source version of your package. This will make it easy for you to update or reproduce your version of the data. I suggest that you put this code in data-raw/. You don’t need it in the bundled version of your package, so also add it to .Rbuildignore. Do all this in one step with:

    usethis::use_data_raw()