subset() 函数:
subset(dataset , subset , select )
dataset 是 要进行操作的数据集
subset 是对数据的某些字段进行操作
select 选取要显示的字段
Example :
```{r spdep} hightech aa = subset(hightech,year==2001&province=="北京",select = c("year","province","PAT")) bb = subset(hightech,year==2001|province=="北京",select = c("year","province","NPO")) aa bb ```
aa:
bb:
原文地址:https://www.cnblogs.com/jiaxinwei/p/12239798.html
时间: 2024-08-06 12:20:56