nb2listw zero.policy

Fri, Sep 11, 2009 3:54 PM

I tried to use nb2listw to create a weight matrix for spautolm. There are 3 cases with no neighbors. I tried to set zero.policy=TRUE but apparently that function doesn't work---I got the error message and I also can't use the object created in spautolm. 

Any ideas?

Thanks!


 adj1<-poly2nb(datashp)

Characteristics of weights list object:
Neighbour list object:
Number of regions: 2173 
Number of nonzero links: 11918 
Percentage nonzero weights: 0.2523968 
Average number of links: 5.484584 
3 regions with no links:
281 1081 1096

Weights style: W 
Weights constants summary:
Error in spweights.constants(x, zero.policy = zero.policy) : 
  regions with no neighbours found
Error in print(data.frame(rbind(unlist(spweights.constants(x, zero.policy = zero.policy))[c(1,  : 
  error in evaluating the argument 'x' in selecting a method for function 'print'

nb2listw zero.policy

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