On Thu, 7 Jan 2010, Noli Sicad wrote:
# Deleting shapefile polygons that doesn't much with record in the
merge dbf file
I have already told you to use "["
new_obj <- obj[keep,]
where keep may be an integer vector of row numbers, a logical vector of
TRUE/FALSE values, or (for newer versions
# Subseting shapefile before merging tables - join table
I realised that deleting the polygon with does match wit the record is
not possible since, I can read the shapefile at all. But still I need
to know how to delete / subset polygons.
I think this is more workable.
1. Read shapefile polygons
# Deleting shapefile polygons that doesn't much with record in the
merge dbf file
I want to do:
1. Delete polygons that doesn't have a match with record in joined /
merge table of the shapefile.
(Done transpose and merging - joined to one-to-one relationship already.)
2. Create a subset of the
Thanks Roger.
Exactly what I was looking for.
Pierre
2010/1/6 Roger Bivand :
> On Wed, 6 Jan 2010, Pierre Roudier wrote:
>
>> Dear list,
>>
>> I'm looking for an easy way to test if a point pattern (I got a data
>> frame of x and y coordinates) is on a regular grid or not.
>>
>> I'm aware of the
Hello.
I have an idea using Thiessenn or voronoi by tripack.
Extending this "points2grid()" method for grid polygon
data will make calculation of spatial weight matrices of
spdep better?
Regards
--- Roger Bivand wrote:
> On Wed, 6 Jan 2010, Pierre Roudier wrote:
>
> > Dear list,
> >
>
Great, thank you for giving me a hand!
Best regards
Marco
Original-Nachricht
> Datum: Tue, 5 Jan 2010 18:54:08 +0100 (CET)
> Von: Roger Bivand
> An: Marco Helbich
> CC: r-sig-geo@stat.math.ethz.ch
> Betreff: Re: [R-sig-Geo] mixed geographically weighted regression
> On Tue,
Tobin Cara wrote:
Hello,
I have recently read an interesting article about integrating Limited Area
Models (LAMs) into kriging with external drift for temperature (Libert� et al.
link below).
www.wmo.int/pages/prog/www/IMOP/.../IOM.../P2(05)_Perini_Italy.doc
This URL is incomplete. Please c
> Depends on your GIS! Shapefiles only have a 1-1 relationship, but
> that's because they are a bit rubbish. If you use a proper spatial
> database then you can do one-many. This is an application for a
> PostGIS or Spatialite database, and if your GIS can read that (Qgis
> for example) then you a
On Wed, Jan 6, 2010 at 6:16 AM, Noli Sicad wrote:
> Hi,
>
> I have problem transposing my database table which is to be merged /
> joined with the shapefile file (*.dbf) inorder to have one-to-one
> relationship with shapefile polygon. As we know that inorder for the
> polygon to be rendered in GI
On Wed, 6 Jan 2010, Noli Sicad wrote:
Review ?reshape to convert to wide format before trying to merge into
your object for using spplot().
Roger
OK. The answer is not possible.
I have been studying reshape - cast and melt. The illustration submit
in my earlier post, can be easily done. But
> Review ?reshape to convert to wide format before trying to merge into
> your object for using spplot().
>
> Roger
OK. The answer is not possible.
I have been studying reshape - cast and melt. The illustration submit
in my earlier post, can be easily done. But here is the real data
(below) is b
There's been a bit of interest in my code so I'll try and make an R
package out of it very soon.
Also I've discovered some slight modification can make
authentic-looking river networks - I've added a bit to my blog post to
show what they look like - scroll to bottom of:
http://geospaced.blogspot
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