县，随机人口坐标生成使用完整的空间…

county, random population coordinates were generated using the complete spatial randomness (CSR) function in S-PLUS. Then, the background information was attached to each individual county based on the county?s distribution for the class of interest. Finally, all counties were merged into a single dataset that describes the whole state-county. random population coordinates were generated using the complete spatial randomness (CSR) fu nction in S-PLUS. Then, the background information was attached to eac h individual county based on the county"s distri bution for the class of interest. Finally, all counties were merged into a single dataset t hat describes the whole state

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