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2012 Aug 29
1
spatial correlation in lme and huge correlation matrix (memory limit)
Hi, I'm trying to introduce a (spatial) exponential correlation structure (with range=200 and nugget.effet of 0.3) in a lme model of this form: lme(ARBUS~YEAR, random=~1|IDSOUS). The structure of the data is "IDSOUS" "XMIN" "YMAX" "YEAR" "ARBUS" with 2 years of data and 5600 points for each year. I do: corstr<-corExp(value=200, form=~XMIN+YMAX|YEAR, nugget=0.3) with |year to calculate co...