[R] ALLOCATE in a FORTRAN subroutine

[MAURICE Jean - externe]

Hi Berend,


>The question belongs on the R-devel mailinglist.
I try to find this mailing-list ...

>You are calling your Fortran routines directly from an R file with .Fortran, I presume?
Yes. Is there another solution (possibility ?)

>Declare them with (:,:) or (*,*), allocate and the return the array? A Fortran95 pointer?
That was what I wanted to do ...

>I think  all of that is just a no no.
It would be a big problem with memory management but R could copy the result before the memory attached to the FORTRAN subroutine is cleared at the end of the routine. R does so strange things (for an old programmer as I am).

>Is it possible to calculate the required size of the array in a separate routine given some parameters (as can often be done with >Lapack routines) before calling the main subroutine?
>If so, call the sizing routine and then declare the correctly sized array in your R code and pass it to the main subroutine.

It's a good idea : a 'two shots' routine. I'll dig that (I'll work in this direction).

Thanks
Jean



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