[R-sig-Geo] lAGRANGE MULTIPLIER Test and error in listw object

[az14]

Dear List, 
I 'm trying to run  the Lagrange multiplier test (LM Test) using R. 
so i import my data file(don) and do an lm regression as bellow: 

don<-read.csv("donnees2.csv",header=TRUE,sep=";",dec=",")widad.lm<-lm(coop~dens_t1+perchom_t1+percvieux_t1+psdc_t1,data=don)
> summary(widad.lm)

Then i import my distance matrix( 1056*1056).


matrice<-read.csv("matw2.csv",header=FALSEE,sep=";",dec=",")
 mat<-do.call(rbind,matrice) 
dim(mat)
is.matrix(mat)
True 
 mat2<-mat%*%mat
> dim(mat2)
[1] 1056 1056
> x <- mat2listw(mat2)
When i run the LM test; with an nb2listw object, i get this error: 

 lm.LMtests(widad.lm,nb2listw(x$neighbours, glist=x$weights,
style="W"),test=c("LMerr","RLMerr"))
Erreur dans subset.listw(listw, subset, zero.policy = zero.policy) : 
  /Not yet able to subset general weights lists
I tryed to do it with mat2listw, but i get error too. 

lm.LMtests(widad.lm, mat2listw(mat2),test=c("LMerr","RLMerr"))
Erreur dans subset.listw(listw, subset, zero.policy = zero.policy) : 
  Not yet able to subset general weights lists


Any help would be appreciated.
Thank you. 
Zineb. 




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