[igraph] as.dendrogram

[Simone Gabbriellini]

Hello List,

I have found communities in my graph through the walktrap.community function. 
Here's the result:

> mywalktrap
Graph community structure calculated with the walktrap algorithm
Number of communities (best split): 27 
Modularity (best split): 0.8075689 
Membership vector:
  [1]  1 19  1  1 10 12 10  0  8 11 15 11 11  1  4  1  1 11 20  1 12  7  1 13 
11 18  6 11 12
 [30]  1  5 13 16  1  6 16 21  1  3  1  1  1 13  1 12  3  5  2 26  0 17  2  6  
1  1 11  5 25
 [59]  0  0 20 20  5 11  6 11 13  1  8 24 11  5  1  4  0  6 19 13  3 14  1  6 
13 20  4 13  0
 [88]  1  1  1 11  1  1  4  5  5 12 14  0  8  5  8  1  2 19  3  3  1  1  3 10 
23  1  5 13  5
[117]  1 18 14  7  3  1  2  4 11  0  8  1  1 14 12 21  1 12  5  1  0  1 12 11  
1 17 11 11  1
[146] 18 13  4  1  0 12  3 12  1  0 14  9  1  5 22 18  0  1  3  2 22 14  1  1  
1  6  4  9  8
[175] 14  3 12  1  8 13 25  1  1  8  1  8  3 11 13 13 19 24 15 13 13 14  7  0  
1 11  1  2 12
[204] 17  0  1 13 15  6  0  5 13  1  3 11  1  2  5 14 12 22 26 20  1  1  3  1  
8  6  6  0 11
[233] 19  3  1 12 15  1 17 13  1  7  1 21 12  3  1 12 13 15 12 17  1 11  5  0  
0  9 11 11  3
[262] 12 16  5  1 11  1  0  3 11  1 23 11 12 13  5  5 15  3  8 12 13 15  1  5  
1 12

maybe I don't understand well the dendrogram structure, but when I call 
as.dendrogram I obtain:

> as.dendrogram(mywalktrap)
'dendrogram' with 2 branches and 2 members total, at height 286

which is not really helpful once plotted...

Am I missing something?

thanks in advance for any help!

best,
simone