On Apr 19, 2012, at 3:46 PM, Emmanuel Levy wrote:
> Hi,
>
> I have a three dimensional array, e.g.,
>
> my.array = array(0, dim=c(2,3,4), dimnames=list( d1=c("A1","A2"),
> d2=c("B1","B2","B3"), d3=c("C1","C2","C3","C4")) )
>
> what I would like to get is then a dataframe:
>
> d1 d2 d3 value
> A1 B1 C1 0
> A2 B1 C1 0
> .
> .
> .
> A2 B3 C4 0
>
> I'm sure there is one function to do this transformation, I just don't
> know which one.
>
> Thanks for your help,
>
> Emmanuel
See ?as.data.frame.table
> as.data.frame.table(my.array, responseName = "value")
d1 d2 d3 value
1 A1 B1 C1 0
2 A2 B1 C1 0
3 A1 B2 C1 0
4 A2 B2 C1 0
5 A1 B3 C1 0
6 A2 B3 C1 0
7 A1 B1 C2 0
8 A2 B1 C2 0
9 A1 B2 C2 0
10 A2 B2 C2 0
11 A1 B3 C2 0
12 A2 B3 C2 0
13 A1 B1 C3 0
14 A2 B1 C3 0
15 A1 B2 C3 0
16 A2 B2 C3 0
17 A1 B3 C3 0
18 A2 B3 C3 0
19 A1 B1 C4 0
20 A2 B1 C4 0
21 A1 B2 C4 0
22 A2 B2 C4 0
23 A1 B3 C4 0
24 A2 B3 C4 0
Regards,
Marc Schwartz
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