[R-sig-Geo] Create listw or nb object from binary edge matrix

[jcoyle]

I am trying to create an nb or listw object for use with spdep functions from
a binary matrix with 1 indicating that two 'regions' are neighbors. However,
the following code does not produce a neighbors list as I think it should
after reading  this previous post
<https://stat.ethz.ch/pipermail/r-sig-geo/2009-February/005070.html>  :mat =
matrix(0, 4, 4)mat[1,2] = 1mat[2,1] = 1mat[3,4] = 1mat[4,3] = 1lw =
mat2listw(mat)lw$neighborsWhat am I doing wrong?Thanks!Jes



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