[R-sig-eco] Comparing variable importance across sites

2013-06-24 Thread Chris Mcowen
Dear list: I am investigating the drivers of variance in fisheries yield over time, across multiple sites (52).My aim is to isolate the drivers of yield in one site compared to another, in order to investigate spatial heterogeneity in the primary correlates. To date i have approached this

Re: [R-sig-eco] Comparing variable importance across sites

2013-06-24 Thread Cade, Brian
Chris: It may make sense to compare relative importance of predictors across regions. But it makes NO SENSE to base measures of relative importance of predictors in your models on AIC weights. AIC weights apply to an entire model (1 to many predictors) not to individual predictors within a