[R-sig-Geo] How to estimate variables of a given vgm model?

2008-07-27 Thread Yong Li
Hi ALL, How can I calculate the corresponding semivariance or distance if a vgm model (model, nug, psill, range are known) and a value of either semivariance or distance are given? I am using gstat R package. Regards Yong ___ R-sig-Geo mailing list R-

Re: [R-sig-Geo] Where is your John Snow's map in "Analysing Spatial Data in R: Why spatial data in R?" available?

2008-07-27 Thread Roger Bivand
On Mon, 28 Jul 2008, Hisaji ONO wrote: Hello. I found in your PDF file, http://www.bias-project.org.uk/ASDARcourse/unit0_slides.pdf. In this document, you used interesting John Snow's "Cholera" map. Is this format ESRI's shapefile? Where is this file available? A GRASS location, and a zip

Re: [R-sig-Geo] rbind and spRbind

2008-07-27 Thread Roger Bivand
On Sun, 27 Jul 2008, Agustin Lobo wrote: Acceptable, yes, but perhaps we should choose one or the other and, for sure, document the difference between spRbind and rbind. Personally, I find a bit odd spRbind() in that you get 2 variables that you were not seeing in data slot (I understand they ar

[R-sig-Geo] Where is your John Snow's map in "Analysing Spatial Data in R: Why spatial data in R?" available?

2008-07-27 Thread Hisaji ONO
Hello. I found in your PDF file, http://www.bias-project.org.uk/ASDARcourse/unit0_slides.pdf. In this document, you used interesting John Snow's "Cholera" map. Is this format ESRI's shapefile? Where is this file available? Once I've created Snow's shapefile(available form this site, http:/

Re: [R-sig-Geo] Spatial Sample

2008-07-27 Thread Roger Bivand
On Sun, 27 Jul 2008, Paul Hiemstra wrote: Hi, One option is: ?spsample - which implements most of Ripley (1981, reprinted 2004, ch.3), and for even more choice, see functions in the spatstat package for point patterns, and the spsurvey package. Roger cheers, Paul Raphael Saldanha sch

Re: [R-sig-Geo] rbind and spRbind

2008-07-27 Thread Agustin Lobo
Acceptable, yes, but perhaps we should choose one or the other and, for sure, document the difference between spRbind and rbind. Personally, I find a bit odd spRbind() in that you get 2 variables that you were not seeing in data slot (I understand they are there as coordinates) of the original obj