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[Questions] 数据代码的意思

Comment Time: 2017/3/18 19:53:11 |  Recent Response Time: 2017/3/26 20:37:27 |  Read Times: 1620 |  Following: 2
Author: zhuyuan |  Tags/Keywords: 数据代码

      下载的数据中有些行的数据用“.”或   “-1”代替,请问它们分别是什么意思?是没有访问数据缺失吗?

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[Post ID: 500] (Reply to the Post 499 ) 回复问题
Reply Time: 2017/3/19 23:20:48 |  Recent Update Time: 2017/3/26 20:37:27 | 
Author: struggle12 |  Tags/Keywords: 回复

 一般地,-2表示不适用;-1表示不知道。空缺的含义需要根据其他变量的信息进行综合判断,多数是不适用。

[Post ID: 507] (Reply to the Post 500 ) 谢谢
Reply Time: 2017/3/26 20:37:27 |  Recent Update Time: 2017/3/26 20:37:27 | 
Author: zhuyuan |  Tags/Keywords:

十分谢谢!

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