3 messages · Barry Rowlingson, Duncan Murdoch, William Dunlap
On Tue, Sep 30, 2014 at 12:53 PM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote:
This appears to be user error. According to Writing R Extensions, the Fortran type corresponding to R logical is INTEGER, not LOGICAL.
Oh yes, a very old and long-standing user error. I assume the CRAN checks don't check this. Has it ever been okay to pass logicals to Fortran? I shall inform the package maintainer.... Thanks Barry
On Tue, Sep 30, 2014 at 12:53 PM, Duncan Murdoch
<murdoch.duncan at gmail.com <mailto:murdoch.duncan at gmail.com>> wrote:
This appears to be user error. According to Writing R Extensions, the
Fortran type corresponding to R logical is INTEGER, not LOGICAL.
Oh yes, a very old and long-standing user error. I assume the CRAN
checks don't check this.
The checks can't really see that kind of thing: they don't understand the external languages. It's up to the user to follow the instructions in most cases.
Has it ever been okay to pass logicals to Fortran?
It's okay to pass R logicals to Fortran (where they become INTEGER), it's just not okay to pass Fortran LOGICALs to R. The gcc Fortran compilers treat logicals the same as C does (i.e. 0 and 1 for FALSE and TRUE), but others don't, as you found out. Duncan Murdoch
I shall inform the package maintainer.... Thanks Barry
In S+ and S it was valid to pass logicals to .Fortran, where they got mapped into the appropriate bit pattern. (The trouble was that 'appropriate' was compiled into the program - so you were locked into our compiler vendor's choice). Passing them between Fortran code and C code has always been a problem (as has passing character data between them). Bill Dunlap TIBCO Software wdunlap tibco.com On Tue, Sep 30, 2014 at 5:39 AM, Barry Rowlingson
On Tue, Sep 30, 2014 at 12:53 PM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote:
This appears to be user error. According to Writing R Extensions, the Fortran type corresponding to R logical is INTEGER, not LOGICAL.
Oh yes, a very old and long-standing user error. I assume the CRAN checks
don't check this. Has it ever been okay to pass logicals to Fortran?
I shall inform the package maintainer....
Thanks
Barry
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