Hi
how could I add a function from old version to new one and then call it in
my program as being accessible by it?
Zahra.
On Wed, Apr 7, 2010 at 6:39 PM, Sean Davis <seand...@gmail.com> wrote:
> On Wed, Apr 7, 2010 at 12:26 PM, zahra sheikhbahaee
> <sheikhbah...@gmail.com> wrote:
> > Hi,
> >
> > I am using a package of R in my python code. I have to import two
> versions
> > of package in my program, because there is a function in one of them
> which
> > does not exist in the new version. The problem is that, afterward I want
> to
> > use one of the functions of new version but it looks for the function in
> old
> > version and ask the parameters of the other version which does not have
> the
> > some abilities of the new funcion. I wonder how I could export from the
> > first package and import in the new one in one program.
>
> This is a limitation of R, I believe. I do not think you can import
> two versions of the same package in R simultaneously (but I could be
> wrong). I would suggest that you take the function from the older
> package and make a new package with that function that depends on the
> newer version of the original package. Also, make sure that the old
> function is truly NOT in the new version of the package, as sometimes
> it is there but not exported. A simple way to check in R is to do:
>
> packagename:::functionname
>
> Note the ::: operator. If none of this is quite right, have a look at
> the R function detach(), but note that detaching a package is not
> guaranteed to be successful.
>
> Sean
>
>
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