[R] any good way to convert sp class objects to splancs object
Greetings: are there any simple ways to convert an sp class object to a splancs ppp class object, outside of reading the coordinates and computing a bounding box? cheers, -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341 __ 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] any good way to convert sp class objects to splancs object
On Wed, 25 Oct 2006, Dylan Beaudette wrote: Greetings: are there any simple ways to convert an sp class object to a splancs ppp class object, outside of reading the coordinates and computing a bounding box? Aren't ppp class objects from the spatstat package? Have you tried the spspatstat wrapper package on the R-spatial sourceforge repository? The as() coerce method should get you there. If you really mean splancs, there are not wrappers yet, but are on their way. (Consider posting on R-sig-geo for specific questions like this). Roger cheers, -- 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.
Re: [R] any good way to convert sp class objects to splancs object
On Wednesday 25 October 2006 12:02, Roger Bivand wrote: On Wed, 25 Oct 2006, Dylan Beaudette wrote: Greetings: are there any simple ways to convert an sp class object to a splancs ppp class object, outside of reading the coordinates and computing a bounding box? Aren't ppp class objects from the spatstat package? Have you tried the spspatstat wrapper package on the R-spatial sourceforge repository? The as() coerce method should get you there. If you really mean splancs, there are not wrappers yet, but are on their way. (Consider posting on R-sig-geo for specific questions like this). Roger cheers, Thanks for the reply Roger. I made a slight mistake. I meant to say: convert sp class object (point / polygon) to a *spatstat* ppp class object. in the mean time i had come up with the following hack: # extract data from sp coords slot # extract data from sp bbox slot #manually build ppp class object with the ppp() function. #note that in spatstat the ordering of vertices in a polygon must be in counter-clockwise direction, so i had to reverse my vertex vectors. i will post the worked up examples with data in a bit. thanks! -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341 __ 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.
