[R] still unclear about the parameters of Moran's I

[zhijie zhang]

I have read the introductions on Moran of SPDEP package, but still
unclear about the parameters of Moran's I, and can't calculate the
Moran's I.

For example,I have a dataset like the following(only an example):
longitude  latitude        x
110.23       32.53       10
  109.52      33.21        20
I want to use the moran(x, listw, n, S0, zero.policy=FALSE,
NAOK=FALSE),and i can't make clear the meaning of the parameters listw
and S0 because of my poor understanding on R, could anybody give me
some programs to show how to calculate Moran's I?
thanks in advance!

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Kind Regards