[R] Subset

[Mark Wardle]

Sergio Della Franca wrote:
> Dear R-Helpers,
> 
> I have this dataset:
> 
>    YEAR    PRODUCTS cluster
>     1          10          2
>     2          42          3
>     3          25          2
>     4          42          3
>     5          40          3
>     6          45          1
>     7          44          1
>     8          47          1
>     9          42          1
> 
> 
> I want to create a subset (when cluster=1),
> 
>     YEAR    PRODUCTS cluster
>     6          45          1
>     7          44          1
>     8          47          1
>     9          42          1
> 
> 
> How can i perform this?
> 
> 

You've answered your own question!

?subset


e.g., subset(my.data, cluster==1)

You should also notice that many R functions support a subset=
parameter, which is very useful!

Mark

-- 
Dr. Mark Wardle
Specialist registrar, Neurology
Cardiff, UK