[R] ALLOCATE in a FORTRAN subroutine

MAURICE Jean - externe jean-externe.maurice at edf.fr
Thu Mar 3 13:57:57 CET 2016

I am 'translating' R functions in FORTRAN subroutines.

Very often, an R function gives an  'array' as result and you don't have to bother with the dimension of the array : R creates automatically an array with the good length. It's not really the case with FORTRAN.

Until now, I create an array with the 'max' dimensions in R, give it to FORTRAN; FORTRAN updates the array and R retrieves it. But calculating the 'max' before calling the FORTRAN subroutine can be complicated. Is it possible to create a 'new' array in a FORTRAN subroutine and to make it be read by R ? In my humble opinion, the answer is NO but as I am new to R ...

The other solution, is to work with dummies dimension in FORTRAN but can R work with that ?

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