According the turtor, I typed the command “library(sp)”, however the terminal told me that the “sp” package could be loaded only if the version is higher than 2.4.0. Orz! if so, it’s none of the R 2.3.1′s business to include the package “sp” inside.

Let me try again, and check out the reason, or there might be some bugs?

PS: today, i discuss this problem with Jiang, and no better ways could undertake, the just copying all the libraries in Jiang’s R library in mine, and this sulotion really works. hehe, what a stange world.

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