Re: [R] confine a dataframe with a polygon
Roger Bivand wrote:
On Tue, 3 Apr 2007, temiz wrote:
hello
how can I confine a dataframe with a known polygon that is part of whole
data ?
Could I suggest following up this question on the R-sig-geo list? It is
not clear what you want to do - are the rows in the data frame points
which may lie inside or outside a polygon? If so, the overlay() methods in
the sp package may be suitable.
regards
thank you for your reply
I have not been aware of that list (R-sig-geo list)
My data is elevation point data in a text file.
I want to create DEMs with different interpolation
methods for comparision.
Actually I created DEM in GRASS using spline tension.
Then I want to create DEM in R with different techniques to compare.
But my data seems so huge for GSTAT-kriging and FIELDS-krig.
So I decided to select smaller interpolation area within whole data.
How can I define a subregion in which I do interpolation ?
I found locator and chull function that may serve this.
I will regard your recommendations.
PS : Thinking facing a memory problem, I refrained from GRASS-R interface.
--
Ahmet Temiz
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[R] confine a dataframe with a polygon
hello
how can I confine a dataframe with a known polygon that is part of whole
data ?
regards
--
Ahmet Temiz
--
This message has been scanned for viruses and\ dangerous con...{{dropped}}
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] confine a dataframe with a polygon
On Tue, 3 Apr 2007, temiz wrote: hello how can I confine a dataframe with a known polygon that is part of whole data ? Could I suggest following up this question on the R-sig-geo list? It is not clear what you want to do - are the rows in the data frame points which may lie inside or outside a polygon? If so, the overlay() methods in the sp package may be suitable. regards -- 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] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
