[R] passing char to Fortran routine

From: Ingmar Visser <I.Visser_at_uva.nl>
Date: Tue 11 Oct 2005 - 01:20:18 EST


Hello all,

I am using an existing Fortran routine that takes a single character string as argument. The routine echoes the argument that I provide. When working on OS X 3.9 there seems to be no problem, ie the Fortran routine nicely echoes my argument. However, I compiled the same package on a PC (using all the tools provided in the R for windows faq), and the routine only echoes the first letter of each character string that I pass on to it.

My questions are:
1) Is this somehow compiler specific?
2) Should I explicitly provide the Fortran routine with the length of the character string?
3) I am at a loss as to what is happening here, so any hint is welcome (-;

The call to the Fortran routine is as follows:

.Fortran("npoptn",as.character(opt),PACKAGE="depmix")

where opt is a character string such as opt="Iteration limit = 100"

best, ingmar



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