R help - Feb 2006 - How to get the namespace of a function?

I declared the environment of the function myfun to be NULL as follows:

environment(myfun) <- NULL

Later on I called that myfun and got an error message because the
function index() in the zoo package was called inside myfun and was
not visible:

Error in myfun(args) : couldn't find function "index"

I tried to use zoo::index() instead of index(), but that did not work.
In fact, zoo::index does not work even in the command line:
> z<-ts(1:5)
> z
Time Series:
Start = 1
End = 5
Frequency = 1
[1] 1 2 3 4 5
> index(z)
[1] 1 2 3 4 5
> zoo::index(z)
Error in loadNamespace(name) : package 'zoo' does not have a name space

How can I qualify index() so that it is visible inside the body of myfun?

Thanks for any suggestions,

FS

Try:

f <- function() get("index", "package:zoo")


On 2/2/06, Fernando Saldanha <fsaldan1 at gmail.com>
wrote:
> I declared the environment of the function myfun to be NULL as follows:
>
> environment(myfun) <- NULL
>
> Later on I called that myfun and got an error message because the
> function index() in the zoo package was called inside myfun and was
> not visible:
>
> Error in myfun(args) : couldn't find function "index"
>
> I tried to use zoo::index() instead of index(), but that did not work.
> In fact, zoo::index does not work even in the command line:
>
> > z<-ts(1:5)
> > z
> Time Series:
> Start = 1
> End = 5
> Frequency = 1
> [1] 1 2 3 4 5
> > index(z)
> [1] 1 2 3 4 5
> > zoo::index(z)
> Error in loadNamespace(name) : package 'zoo' does not have a name
space
>
> How can I qualify index() so that it is visible inside the body of myfun?
>
> Thanks for any suggestions,
>
> FS
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>

On 2/2/2006 10:56 AM, Fernando Saldanha wrote:
> I declared the environment of the function myfun to be NULL as follows:
> 
> environment(myfun) <- NULL
Since version 2.1.0, it's been recommended that you use

environment(myfun) <- baseenv()

and since 2.2.0, you'll get a warning when using NULL (and you'll get an
error in 2.3.0).  But why would you want to do that?  What are you 
trying to achieve?

Duncan Murdoch

> 
> Later on I called that myfun and got an error message because the
> function index() in the zoo package was called inside myfun and was
> not visible:
> 
> Error in myfun(args) : couldn't find function "index"
> 
> I tried to use zoo::index() instead of index(), but that did not work.
> In fact, zoo::index does not work even in the command line:
> 
>> z<-ts(1:5)
>> z
> Time Series:
> Start = 1
> End = 5
> Frequency = 1
> [1] 1 2 3 4 5
>> index(z)
> [1] 1 2 3 4 5
>> zoo::index(z)
> Error in loadNamespace(name) : package 'zoo' does not have a name
space
> 
> How can I qualify index() so that it is visible inside the body of myfun?
> 
> Thanks for any suggestions,
> 
> FS
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html