[R-sig-Geo] reading a gps from R

[Patrick Giraudoux]

Sorry to answer to myself. I have found a solution for the 2nd question: 
from R within windows the gps can be read with:

shell("gpsbabel -w -i garmin -f com4: -o openoffice -F \"wpt.txt\"")

The 1th question about reading the gps data directly to an R object 
unstead of a text file is still unanswered...

Cheers,

Patrick



Patrick Giraudoux a écrit :
> Dear Listers,
>
> I am trying to write R fonctions to read data from a gps through 
> gpsbabel.
>
> Within linux I have tried this (read garmin gps and write a tab 
> delimited text file wp.txt) and it works well:
>
> system("gpsbabel -w -i garmin -o openoffice /dev/ttyUSB0 
> /home/giraudoux/wp.txt")
>
> I have two questions:
>
> 1/ I wonder whether it would be technically possible to open the 
> connexion directly to a R object (eg data.frame) rather than to write 
> a text file (here wp.txt) ?
>
> 2/ I wonder how to open a USB device/port within a windows XP 
> environment (linux equivalent of /dev/ttyUSB0).
>
> Thanks in advance for any hint...
>
> Patrick
>
>
>