[Rd] Out-of-date manual or small bug in R CMD check?

From: Gabriel Becker <gmbecker_at_ucdavis.edu>
Date: Mon, 29 Aug 2011 15:37:48 -0700


ink1">Hey all,

I get a warning about an unsupported file type in the data directory during R CMD check (for R 2.13.1) if I use the save function to create an Rdata, but if I save the same object to a .rda file, no warning.

Section 1.1.5 (pg 11 of the pdf) of the Writing R Extensions manual (2.13.1) appears to say that .Rdata files should be fine:

" Data files can have one of three types as indicated by their extension: plain R code (‘.R’ or
‘.r’), tables (‘.tab’, ‘.txt’, or ‘.csv’, see ?data for the file formats, and note that ‘.csv’ is not
the standard14 CSV format), or save() images (‘.RData’ or ‘.rda’). "

Am I misunderstanding some difference between .rda and .Rdata files in terms of the save calls, or should R CMD check and the extensions manual agree on this?

Thanks for all your hard work.
~G

SessionInfo:

R version 2.13.1 (2011-07-08)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:

 [1] LC_CTYPE=en_US.utf8       LC_NUMERIC=C
 [3] LC_TIME=en_US.utf8        LC_COLLATE=en_US.utf8
 [5] LC_MONETARY=C             LC_MESSAGES=en_US.utf8
 [7] LC_PAPER=en_US.utf8       LC_NAME=C
 [9] LC_ADDRESS=C              LC_TELEPHONE=C

[11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C

attached base packages:
[1] grid stats graphics grDevices utils datasets methods
[8] base

other attached packages:
[1] gridSVG_0.5-10 ProteinVis_0.4 latticeExtra_0.6-18
[4] RColorBrewer_1.0-2 lattice_0.19-33

-- 
Gabriel Becker
Graduate Student
Statistics Department
University of California, Davis

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