[R] [] vs [[]]

[Kaspar Pflugshaupt]

On 20.10.2000 10:40 Uhr, Bill Simpson wrote:

> List
>> x<-list(1,2,3,4)
>> x[2]
> [[1]]
> [1] 2
> 
>> x[[2]]
> [1] 2
> doesn't seem to matter if you use [] or [[]]


It does!

In the first case, you get back a list with just one item (as you can see by
the [[1]] line). In the second case, it's just the item. That's all the
difference I found, though.

Cheers

Kaspar

-- 

Kaspar Pflugshaupt
Geobotanisches Institut
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