请问stata里面用IF语句的时候怎么表示两个条件 | 您所在的位置:网站首页 › 双重条件的if函数怎么使用 › 请问stata里面用IF语句的时候怎么表示两个条件 |
能不能查查帮助啊 或者把基础的书先看看。 ----------------------------------------------------------------------------------------------------------help for if manual: [U] 14 Language syntax---------------------------------------------------------------------------------------------------------- if qualifier command if exp exp in the syntax diagram means an expression, such as age>21. See help exp for an explanation of expressions. There is another if used in Stata programming; see help ifcmd. Description if at the end of a command means the command is to use only the data specified. if is allowed with most Stata commands. Examples . list make mpg if mpg>25 . list make mpg if mpg>25 & mpg25 | mpg |
CopyRight 2018-2019 实验室设备网 版权所有 |