[R-sig-Geo] spGRASS6 issue

[R.S. Bhalla]

Thanks Rodger,
That fixed it. I agree with Rainer, it is somewhat non-intuitive.
By the way, I've been using GRASS from within R to process dozens of 
images using loops, works like a charm and saved me hours if not days of 
repetitive work.
Thanks again and cheers,
Ravi
P.S. The corrected formula is:
execGRASS("r.neighbors", parameters=list(input=patmap, output=n11map, 
method="median", size=(11L)), flags=c("overwrite", "c"))


On 02/06/2013 05:52 PM, Rainer M Krug wrote:
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> On 06/02/13 12:55, Roger Bivand wrote:
>> On Wed, 6 Feb 2013, R.S. Bhalla wrote:
>>
>>> Dear List, I have run into trouble with the execGRASS command copied below and can't figure
>>> out what I'm doing wrong. It runs fine without the size=11 argument (takes the default value
>>> of 3). Can
>>> storage.mode(11)
>> [1] "double"
>>> is.integer(11)
>> [1] FALSE
>>> is.integer(11L)
>> [1] TRUE
>>
>> Just because it looks like an integer, it doesn't mean it is.
> Hi Roger
>
> this has bittan many users, including myself, as it is a little aux contraire to R, as here 11 is
> acepted as integer in most circumstances.
>
> Would it be possible to use a different check for integer e.g.
>
> if(as.integer(x) == x) then {x <- as.integer(x)} else {ERROR}
>
> I have the feeling that would be more in line with the treating in R of different numerical
> storage modes.
>
> Cheers,
>
> Rainer
>
>
>
>> Roger
>>
>>> someone please help. Thanks in advance, Ravi
>>>
>>> Command: execGRASS("r.neighbors", parameters=list(input=patmap, output=n11map,
>>> method="median", size=11), flags=c("overwrite", "c"))
>>>
>>> Error: Error in doGRASS(cmd, flags = flags, ..., parameters = parameters, echoCmd = echoCmd)
>>> : Parameter <size> does not have integer value
>>>
>>>
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-- 
R.S. Bhalla, Ph.D.
Sr.Research Fellow
Foundation for Ecological Research, Advocacy and Learning (FERAL)
Ph. +91 413 2671566
Fax. +91 413  2671567
Web: http://www.feralindia.org