Re: [R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Hi Steve, syrjala function requires that the columns of the "coords" data.frame are named "x" and "y". From the help page of syrjala: coords A data.frame with '$x' and '$y' components. So you have only to rename it: > names(coords)=c("x","y") > syrjala(coords, var1, var2, ) Cramer-von M

Re: [R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Just one more suggestion: If you can assume that the "slightly different" locations are inside the same cell of the grid, you could consider using Syrjala's test (although it deals with testing difference between the spatial distributions of two populations irrespectively of each species abunda

Re: [R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Thank you for all valuable comments and suggestions. I will try those methods in the comments and will post questions/progresses whether or not it is successful in my particular case. Thank you very much again!! Steve On Fri, Apr 15, 2011 at 4:27 PM, Steve Hong wrote: > Dear List, > > I hope

Re: [R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Hi, El lun, 18-04-2011 a las 04:58 -0700, Corey Sparks escribió: > Would the cross L or K function not give you a descriptive tool for what you > want? they measure clustering in two or more point patterns. See > ?Lcross > or > ?Kcross > in spatstat. Also there are inhomogeneous Poisson process

Re: [R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Would the cross L or K function not give you a descriptive tool for what you want? they measure clustering in two or more point patterns. See ?Lcross or ?Kcross in spatstat. Also there are inhomogeneous Poisson process models as well, Lcross.inhom Cheers, Corey - Corey Sparks, PhD Assistan

Re: [R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Apparently not: http://finzi.psych.upenn.edu/R/Rhelp02/archive/98714.html On Mon, Apr 18, 2011 at 6:22 PM, Gerald Johann to Büren wrote: > Hi, > I would suggest the > SADIE-Method. > As far as I know it ist not yet implemented for R,

Re: [R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Hi, I would suggest the SADIE-Method. As far as I know it ist not yet implemented for R, but there is a free Standalone-Tool available. with best regards Gerald PS: Does anyone know if it is there is an R-package for that? On Fri, Apr

[R-sig-Geo] comparing spatial distribution of two species in a same area with different coordinates

Dear List, I hope this is not a redundant question. I tried to find the issue from the previous lists but could not find although there are several comments about comparing two species distribution in the same area and coordinates. I have a data set with species counts in a study area, however,