I would like to know how do I extract just the number 4? Sorry if the question is simple

```
> a<-subset(a, data ==datas & category == chosse, select="PCP")
> a
# A tibble: 1 x 1
PCP
<dbl>
1 4
```

I would like to know how do I extract just the number 4? Sorry if the question is simple

```
> a<-subset(a, data ==datas & category == chosse, select="PCP")
> a
# A tibble: 1 x 1
PCP
<dbl>
1 4
```

use a$PCP?

I am not sure whether I understand your question clearly.