Thanks Spencer "Give a wo/man a fish and s/he becomes an aid dependent, give a wo/man a rod and s/he becomes a fisherman"
Sam >-----Original Message----- >From: Spencer Graves [mailto:[EMAIL PROTECTED] >Sent: Tuesday, 23 May 2006 9:58 AM >To: McClatchie, Sam (PIRSA-SARDI) >Cc: [email protected] >Subject: Re: [R] Cross correlation/ bivariate/ mantel > > RSiteSearch("mantel statistic") produced 27 hits for >me, but the first few suggested I might not find enlightenment there. >RSiteSearch("spatial statistics") returned 1064 hits, so I >restricted that to RSiteSearch("spatial statistics", >"functions"). The first of those was a director for the >'spdep' package. A search for "Mantel" on that page >identified "plot.mc.sim: Mantel-Hubert spatial general cross >product statistic". I haven't tried it. I know nothing more >about it than what I've already told you. > > I hope you'll forgive the terrible pun if I say that >I hope I not only gave you a fish, I showed you how I caught it. > > Best Wishes, > Spencer Graves > >McClatchie, Sam (PIRSA-SARDI) wrote: >>> Background: >>> OS: Linux Ubuntu Dapper >>> release: R 2.3.0 >>> editor: GNU Emacs 21.4.1 >>> front-end: ESS 5.2.3 >>> ----------------------------- >>> Colleagues >>> >> I have two spatial datasets (latitude, >longitude, fish eggs) and (latitude, longitude, fish larvae) >at the same 280 stations (i.e. 280 cases). I want to determine >if the 2 datasets are spatially correlated. In other words, do >high numbers of larvae occur where there are high numbers of >eggs? I would like to calculate the cross correlation for >these bivariate data and calculate a Mantel statistic as >described on pg. 147 of Fortin and Dale 2005 "Spatial analysis". >> >> My search of R packages came up with >acf and ccf functions but I don't think these are what I want. >Does anyone know which spatial package I might find the >appropriate test, please? >> >>> Best fishes >>> >>> Sam >>> ---- >>> Sam McClatchie, >>> Biological oceanography >>> South Australian Aquatic Sciences Centre PO Box 120, Henley Beach >>> 5022 Adelaide, South Australia email >>> <[EMAIL PROTECTED]> >>> Cellular: 0431 304 497 >>> Telephone: (61-8) 8207 5448 >>> FAX: (61-8) 8207 5481 >>> Research home page <http://www.members.iinet.net.au/~s.mcclatchie/> >>> >>> /\ >>> ...>><xX(°> >>> //// \\\\ >>> <°)Xx><< >>> ///// \\\\\\ >>> ><(((°> >>> >><(((°> ...>><xX(°>O<°)Xx><< >>> >> >> [[alternative HTML version deleted]] >> >> >> >> >---------------------------------------------------------------------- >> -- >> >> ______________________________________________ >> [email protected] mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide! >> http://www.R-project.org/posting-guide.html > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
