[R] RWin 1.2.1: Can't access sample datasets, e.g. MASS

[Thomas Lumley]

On Mon, 5 Feb 2001, peter denisevich wrote:

> I'm pretty sure I'll feel like [more of] an idiot but...
> Using Rgui working in a fresh, blank directory.
> 
> 
>  > require(MASS)
> Loading required package: MASS
> [1] TRUE
>  > data(cabbages)
> Warning message:
> ======> Data set `cabbages' not found in: data(cabbages)  <=====
<snip>
> 
> Same result for any other dataset.

I get this for MASS only, not for other packages

 
> All packages were installed in RW1021/library/<pkg>, some by manual 
> download/rinst some by install.packages().
> 
> Note that after installation, the library/MASS/data directory contained 
> ONLY RData.zip, so I unzipped it; the same for the other data (and R-ex) 
> directories in the tree.  Is this new behavior?

Yes, RData.zip is deliberate. It saves space (particularly with a FAT16
disk, where little files are very inefficient). In general, if the
installer puts it there you should leave it there.

However, there does seem to be a bug in the packaging of the current MASS
version. The data/filelist file, which is supposed to give the contents of
RData.zip actually has the contents of the data/ directory. 
As a workaround If you edit this file to list the contents of RData.zip
(or just the files you want to load), data() will work.	

	-thomas

Thomas Lumley			Asst. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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