[R] .Call works in R 2 not in R 3

[Erich Neuwirth]

cutree is a function available in stats.
So it might be worth a try to just replace

.Call("R_cutree", tree$merge, k, PACKAGE = "stats”)

by

cutree(tree$merge,k)

and see what happens.

checking the source of cutree shows the following call

    ans <- .Call(C_cutree, tree$merge, k)

so replacing R_cutree by C_cutree also might be an option.
But, of course as Uwe recommended,
using a plain R call and not using .Call is the preferred solution.


> On Mar 8, 2016, at 14:55, Sebastien Moretti <sebastien.moretti at unil.ch> wrote:
> 
>>> Hi
>>> 
>>> I inherited a R package done in 2004 that works perfectly in R 2.15.1
>>> and before, but not in R 3.2.2 ( >= 3).
>>> 
>>> I have already fixed issues with namespace for functions in R 3 but
>>> maybe not all of them.
>>> 
>>> Here is the error message:
>>> Error in .Call("R_cutree", tree$merge, k, PACKAGE = "stats")
>>> "R_cutree" not available for .Call() for package "stats"
>> 
>> Why do you .Call() into another package? Rather use the API.
> 
> Let's say that I am far from a R master.
> I never use .Call() myself.
> 
> I want the code works again in R >= 3 because R support for R 2 will soon be stopped in my institute.
> When the code will work again, I could change internals by comparing results with R 2 and R 3.
> 
>> Best,
>> Uwe Ligges
>> 
>>> 
>>> Thanks for your help
> 
> --
> Sébastien Moretti
> 
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