R语言 subset

R语言 subset()函数用法

subset() 函数：

subset(dataset , subset , select )

dataset 是 要进行 *** 作的数据集

subset 是对数据的某些字段进行 *** 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: