[GRASS-user] rgrass7 syntax for passing a command

Jim Maas j.maas at uea.ac.uk
Thu Apr 28 08:53:52 PDT 2016


Using GRASS 7.0.3 on Ubuntu Linux,

I'm attempting to recreate the example of r.stream.distance shown at
https://grass.osgeo.org/grass70/manuals/addons/r.stream.distance.html

by passing these comands to GRASS from within an R session.  I can't 
figure out the correct syntax to pass this command to the system and 
also GRASS, any suggestions ?

The original code for GRASS command line in the example is

# Create outlet
echo "636645,218835" | v.in.ascii -n input=- output=outlet separator=","


I've tried lots of combinations of both system() and execGRASS() 
including this

system(message ("327500.00,523896.55") | "v.in.ascii", input="-", 
output="outlet", separator=",", flags=c("n", "overwrite"))




but have been unsuccessful.

Any suggestions?

Thanks, J

-- 
Dr. Jim Maas
Norwich Medical School



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