Re: [R-sig-eco] spatial correlation

2017-11-21 Thread trichter
Dear Andrew, if i understand your code correctly, you first find a signifant rda(abund~dist), confirmed by NMDS ordination, but then you cannot find significant correlation between the residuals of a linear model (abund~dist). You may want to have a look at Dray et al 2012 "Community ecolog

[R-sig-eco] spatial correlation

2017-11-20 Thread Andrew Halford
Hi Listers, I am trying to better understand how spatial autocorrelation is determined. I have attached 2 txt files one is a fish species x sites abundance table and the other is a distance file with the lat and longs for each site (converted to cartesian coords). I have run the tests for spatial

[R-sig-eco] spatial correlation in mixed-effect models

2012-06-27 Thread aletsia83
Hello. Recently, I started to develop regression models using spatial data. In particular, I've been developing mixed-effect models. My data requires to take into consideration spatial autocorrelation, so I decided to use the corStruct function in the nlme library. Once I built a variogram plot t