[R] Do I need a special package to call a fortran program within R?

[Chaochao Gao]

Hi, there,

I tried to use " system (command.txt)" to run a executive fortran code
(like a.out) within R. But the screen shows that " impossible to run"
this command. This is the first time I use R, so I was wondering if
there is a special package to run fortran program.  Any help will be
highly aprreciated.

Chaochao