On Fri, Sep 19, 2008 at 11:42 AM, Hamish <[EMAIL PROTECTED]> wrote: > Rainer Krug wrote: >> do the modules of R (e.g. r.stats, ...) have return values >> which I can evaluate to find out if the execution was successful? > > Yes. GRASS modules all return 0 on success and 1 on failure.
Good to know - thanks as lot Rainer > > >> I would like to use these "return values on error" to evaluate the >> success of the command when called from R. > > In most cases you can trust that method. Maybe 1% of modules use a > different failure code, if so it's a bug & please report it. > > > Some/many of the internal C functions will use 1 as success, but they > will typically be called G_is_something() and return a boolean result. > The lib fns return all sorts of things, always check before using them. > > > Hamish > > > > > > -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Faculty of Science Natural Sciences Building Private Bag X1 University of Stellenbosch Matieland 7602 South Africa _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
