datalist and data objects in R Package building

Thank you for your response.

Yes, using a call to data() after 1) building and 2) installing my own
package is exactly what I'm trying to accomplish.  I am building a package.
  I would like to load the data objects that are part of the custom package
that I have created and installed on my machine.  Apologies if I wasn't
clear about that part.

2011/3/28 Uwe Ligges<ligges at statistik.tu-dortmund.de>

On 24.03.2011 16:51, andrew stewart wrote:

Hello all,

I have,say 4 R objects...  bar1, bar2, bar3, bar4.. that I'd like to
include
in an R package "foobar".

The desired functionality would be:

  library(foobar)

data(foo)
ls()

[1] "bar1" "bar2" "bar3" "bar4"

I've tried the following two approaches:

1) I created the file 'datalist' under pre-build directory 'foobar/data/'
with the following contents:
foo: bar1 bar2 bar3 bar4

After package build and install, "data(foo)" reports that data set 'foo'
not
found (bar1, bar2, etc are all available individually, and are listed
under
data() as "bar1 (foo)".

If you want just one object "foo", then prpare a list

foo<- list(bar1,...)

that contains the 4 objects bar1, ... .
You can load that objects and access the list components afterwards.

I think you misunderstood the data concept: You can save objects and load
them if the package is installed. That's it.

Best,
Uwe Ligges



  2) I created an image via save.image resulting in foo.rda (containing

bar1,
bar2, etc).

data(foo) now loads bar1 - bar4, but 'foo' doesn't appear in the list of
available datasets displayed when trying to tab complete within data().


So my question is, what's the correct approach for what I'm trying to do
here?  Any advice welcome and appreciated.

Thanks,
Andrew

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