文档介绍：: .

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变量标签....................................................................................................................................11
更改变量名................................................................................................................................11
修改数据文件............................................................................................................................11
数据文件的纵向连接和横向连接 ............................................................................................12
一、纵向连接........................................................................................................................12
二、横向连接........................................................................................................................13
记录查找....................................................................................................................................14
数据双录入和核对....................................................................................................................14
一、选则关键字段................................................................................................................14
二、选则项：........................................................................................................................15
EPIDATA 中的字段类型 ...........................................................................................................15
一、自动编码字段................................................................................................................15
二、数值型字段....................................................................................................................16
三、字符型字段..............................................................