R devel - Mar 2015 - Import data set from another package?

I've moved nlme from Depends to Imports in my coxme package. However, a few
of the
examples for lmekin use one of the data sets from nlme.  This is on purpose, to
show how
the results are the same and how they differ.

  If I use  data(nlme::ergoStool)  the data is not found, data(nlme:::ergoStool)
does no
better.
  If I add importFrom(nlme, "ergoStool") the error message is that
ergoStool is not exported.

There likely is a simple way, but I currently don't see it.

Terry T.

On 03/02/2015 04:48 PM, Therneau, Terry M., Ph.D. wrote:
> I've moved nlme from Depends to Imports in my coxme package. However, a
> few of the examples for lmekin use one of the data sets from nlme.  This
> is on purpose, to show how the results are the same and how they differ.
>
>   If I use  data(nlme::ergoStool)  the data is not found,
> data(nlme:::ergoStool) does no better.
>   If I add importFrom(nlme, "ergoStool") the error message is
that
> ergoStool is not exported.
>
> There likely is a simple way, but I currently don't see it.
In your examples, can't you use:

data("ergoStool", package="nlme")

?

That is how a user would call it if they wished to use the dataset.

Regards,

Brian

-- 
Brian G. Peterson
http://braverock.com/brian/
Ph: 773-459-4973
IM: bgpbraverock

How about just nlme::ergoStool ?

Hadley

On Mon, Mar 2, 2015 at 4:48 PM, Therneau, Terry M., Ph.D.
<therneau at mayo.edu> wrote:
> I've moved nlme from Depends to Imports in my coxme package. However, a
few
> of the examples for lmekin use one of the data sets from nlme.  This is on
> purpose, to show how the results are the same and how they differ.
>
>  If I use  data(nlme::ergoStool)  the data is not found,
> data(nlme:::ergoStool) does no better.
>  If I add importFrom(nlme, "ergoStool") the error message is that
ergoStool
> is not exported.
>
> There likely is a simple way, but I currently don't see it.
>
> Terry T.
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel


-- 
http://had.co.nz/

You could add something like this to your package:

.onLoad <- function(libname, pkgname){
  data(ergoStool, package="nlme", envir = environment(.onLoad));
}

This should basically do the same as importFrom(nlme, "ergoStool") but
then for a lazy load dataset.


On Mon, Mar 2, 2015 at 2:48 PM, Therneau, Terry M., Ph.D.
<therneau at mayo.edu> wrote:
> I've moved nlme from Depends to Imports in my coxme package. However, a
few
> of the examples for lmekin use one of the data sets from nlme.  This is on
> purpose, to show how the results are the same and how they differ.
>
>  If I use  data(nlme::ergoStool)  the data is not found,
> data(nlme:::ergoStool) does no better.
>  If I add importFrom(nlme, "ergoStool") the error message is that
ergoStool
> is not exported.
>
> There likely is a simple way, but I currently don't see it.
>
> Terry T.
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

On 02/03/2015 22:48, Therneau, Terry M., Ph.D. wrote:
> I've moved nlme from Depends to Imports in my coxme package. However, a
> few of the examples for lmekin use one of the data sets from nlme.  This
> is on purpose, to show how the results are the same and how they differ.
>
>   If I use  data(nlme::ergoStool)  the data is not found,
> data(nlme:::ergoStool) does no better.
>   If I add importFrom(nlme, "ergoStool") the error message is
that
> ergoStool is not exported.
>
> There likely is a simple way, but I currently don't see it.
There were some off-the-mark suggestions in this thread.  If you just 
want a dataset from a package, use

data("ergoStool", package = "nlme")

In particular, it is somewhat wasteful to load a large namespace like 
nlme when it is not needed.


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
1 South Parks Road, Oxford OX1 3TG, UK

As I expected: there was something simple and obvious, which I somehow could not
see.
Thanks for the pointer.

Terry T.


On 03/03/2015 03:12 AM, Prof Brian Ripley wrote:
> On 02/03/2015 22:48, Therneau, Terry M., Ph.D. wrote:
>> I've moved nlme from Depends to Imports in my coxme package.
However, a
>> few of the examples for lmekin use one of the data sets from nlme. 
This
>> is on purpose, to show how the results are the same and how they
differ.
>>
>>   If I use  data(nlme::ergoStool)  the data is not found,
>> data(nlme:::ergoStool) does no better.
>>   If I add importFrom(nlme, "ergoStool") the error message is
that
>> ergoStool is not exported.
>>
>> There likely is a simple way, but I currently don't see it.
>
> There were some off-the-mark suggestions in this thread.  If you just want
a dataset from
> a package, use
>
> data("ergoStool", package = "nlme")
>
> In particular, it is somewhat wasteful to load a large namespace like nlme
when it is not
> needed.
>
>