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I have a 3 dim binary array and want to locate and retrieve the connected components. I looked into the documentation of the "igraph" package but it seemed to only consider matrices.Did I miss a function relative to my problem? Thank you.

(edit) example

> a=replicate(4,rnorm(4))
> a[a>0]=1
> a[a<0]=0
>      [,1] [,2] [,3] [,4]
 [1,]    1    0    0    1
 [2,]    0    0    0    1
 [3,]    1    1    1    0
 [4,]    0    0    1    0

In this 2 dim example 3 blobs are created. [1,1], [1:2,4], [3,1:3] U [4,3]

Package igraph seems to be able to handle connectivity in 2 dim.I'm wondering if it can handle it in 3.

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