McClatchie, Sam (PIRSA-SARDI <mcclatchie.sam <at> saugov.sa.gov.au> writes:
> > 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". > Package ade4 has mantel.randtest and package vegan has mantel . Both functions find the Mantel statistic. If you need partial Mantel statistic, you can try partial.mantel in vegan or this code that I contributed some time ago: https://stat.ethz.ch/pipermail/r-help/2003-September/038985.html Marcelino de la Cruz Departamento de Biologia Vegetal Universidad Politecnica de Madrid Spain ______________________________________________ [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
