Hi I encountered that problem and got in contact with the RSAGA
maintainer about this problem. He suggested the following (temporary)
solutions, which works for me:
rsaga.geoprocessor("grid_calculus", 1, list(INPUT="dem.sgrd;brillo.sgrd",
RESULT="out2", FORMUL="a/b"),beep.off = FALSE)
In other words, include the beep.off argument, but set it to FALSE
(defaults to TRUE). Hope this helps, Paulo Message: 8 Date: Mon, 4 Feb
2008 13:05:41 -0500 From: Al? Santacruz <[EMAIL PROTECTED]> Subject:
Re: [R-sig-Geo] FYI: Merging GIS and statistics --- RSAGA To: Tomislav
Hengl <[EMAIL PROTECTED]>, <[email protected]> Message-ID:
<[EMAIL PROTECTED]> Content-Type: text/plain
Hi, I am trying to use the Grid Calculator in SAGA, through RSAGA but I
have problems with the parameter FORMUL, I can´t get the function "a/b"
works, the functions "a+b", or "a-b", or "a*b" works, but "a/b" does
not, Any help is appreciated, see the code below for the errors
reported, thanks, Ali Santacruz M.Sc. Geomatics. National University of
Colombia, Bogota, Colombia E-mail: [EMAIL PROTECTED]
------------------------------
Message: 9
Date: Mon, 4 Feb 2008 19:29:37 +0100 (CET)
From: Roger Bivand <[EMAIL PROTECTED]>
Subject: Re: [R-sig-Geo] FYI: Merging GIS and statistics --- RSAGA
To: Al? Santacruz <[EMAIL PROTECTED]>
Cc: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"
On Mon, 4 Feb 2008, Al? Santacruz wrote:
> >
> >
> > Hi,
> >
> > I am trying to use the Grid Calculator in SAGA, through RSAGA but I have
> > problems with the parameter FORMUL,
> >
> > I can?t get the function "a/b" works,
> >
> > the functions "a+b", or "a-b", or "a*b" works, but "a/b" does not,
> >
> > Any help is appreciated,
> >
> > see the code below for the errors reported,
> >
> > thanks,
> >
> > Ali Santacruz
> > M.Sc. Geomatics.
> > National University of Colombia,
> > Bogota, Colombia
> > E-mail: [EMAIL PROTECTED]
> >
> >
> > ## this formula does not work:
>
>> >> rsaga.geoprocessor("grid_calculus", 1,
>> >> list(INPUT="dem.sgrd;brillo.sgrd", RESULT="out2",
>> >> FORMUL="a/b"))
>> >> C:\Users\geomatica\Desktop
>> >> C:\Users\geomatica\Documents\R\win-library\2.6\RSAGA\saga_vc\saga_cmd.exe
>> >> grid_calculus 1 -silent -INPUT dem.sgrd;brillo.sgrd -RESULT out2
>> >> -FORMUL a\b
>>
^^^^
A very smokey smoking gun, isn't it? The interface is converting all
forward slash to backslash (Windows *does* respect forward slash in file
path names, so this isn't strictly needed), so you'll have to try to
escape the value until you see a/b coming through. I'm in doubt whether
you'll have any luck, though:
...
if (beep.off & .Platform$OS.type=="windows") {
command = gsub("/","\\",command,fixed=TRUE)
^^^^^^^^
batch = c("net stop beep",command)
batchfilename = paste(tempfile(),".bat",sep="")
batchfile = file(batchfilename,"wt")
writeLines(batch,con=batchfile)
close(batchfile)
command = batchfilename
}
...
in R/RSAGA-core.R, which converts everything whether a file path or not.
Roger
PS. Is the RSAGA maintainer subscribed to this list?
> >
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