On Thu, 28 Feb 2008, Rainer M Krug wrote:
On 28/02/2008, Roger Bivand <[EMAIL PROTECTED]> wrote:
On Wed, 27 Feb 2008, Rainer M Krug wrote:
Hi
Sorry for crossposting, but I think this can be of interest for GRASS
and R
users.
Yes, please avoid cross-posting - the discussion ends up on many different
lists and threading can break down if the threading implementation in mail
clients and archives doesn't like cross-posting.
OK - I'll avoid it in the future and continue this thread on grass-dev.
The only complete thread I have found is on Nabble at:
http://www.nabble.com/Plan-to-build-Package-to-use-GRASS-from-R-tt15712877.html#a15712877
for the grass-dev list.
In summary, the problems are mostly those of appropriately quoting shell
commands through system() across platforms. Those interested should follow
the discussion on grass-dev.
The correct lists could be either here, or the grass-stats list; could
I think I will leave it at the grass-dev list, altohough it concerns grass
and R - it is more a devel issue then for the grass-stats list.
Rainer post a summary to both (hopefully in-thread) on conclusion?
OK - I will do so as soon some ideas and further palns emerge.
If I have a working solution, would it be possible to include it into the
spgrass6 package?
It is actually to some extent a re-write of spgrass6, using other
mechanisms to run the GRASS commands. In that context, yes, I'd be
interested. See my post on grass-dev (I'm reading there digested at
present).
Roger
Thanks
Rainer
Roger
I am planning to write a package to make the use of GRASS from R easier.
The
idea is to wrap the system call to execute the GRASS command into an R
command of the same name.
e.g:
r.to.vect <- function(..., intern=TRUE, ignore.stderr=FALSE)
{
comm <- paste( "r.to.vect ", ..., sep="" )
print(comm)
system( comm, intern=intern, ignore.stderr=ignore.stderr )
}
My questions are:
1) Is this a good way of doing it, or is giving a named list to the
function
more usefull?
2) Is there a way to obtain easily all commands from GRASS and the
parameters possible and required?
Any ideas and comments welcome,
Rainer
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: [EMAIL PROTECTED]
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: [EMAIL PROTECTED]
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