I am hoping to use the openSTARS package that relies on GRASS 7.0 within R. However, I do not understand how to proceed with the initial steps.
A functional installation of GRASS GIS (>=7.0) with installed add-ons r.stream.basins, r.stream.distance, r.stream.order and r.hydrodem is needed. These add-ons can be installed from within GRASS using the console and g.extension or in the GUI under 'Settings'/'Addons extensions'/'Install extensions from add-ons' under 'raster'.
Do I install GRASS as a stand-alone or do I install it from within R? How do I get to "GRASS using the console" (R's console or GRASS's console)? The vignette is extremely detailed and well-laid out after these points but it assumes we understand GRASS so I'm stuck.