Re: [igraph] Get communities with less than 8 nodes then remove isolates

[Benika H]

Hi again everyone,

After not being able to plot the subgraph via the code

right_size <- which(sizes(wc) < 8 & sizes(wc) > 1)

subg <- induced.subgraph(y, which(membership(wc) %in% right_size))

I found an alternative from an sna tutorial.

Below is code where I was able to get the indices for the communities of interest.

Is there a way I can plot the communities as a graph/subgraph from this index???

I am aware that I would have to convert it into a graph object, but I have not been successful in my attempts.

I want to do something as follows:

h <- comlist[bigComIndex]

newdata <- as.data.frame(h, header=F) ##Gives me an error (expects at least 2 columns)

graph.data.frame(newdata)##Gives me an error(not a graphical object)

Thanks in advance,

Benika H

On Wed, Feb 4, 2015 at 8:26 PM, Benika H <address@hidden> wrote:

right_size <- which(sizes(wc) < 8 & sizes(wc) > 1)

subg <- induced.subgraph(y, which(membership(wc) %in% right_size))

That code is only giving me 9 communities of one node. 

Is there another way?

when I print out sizes(wc), I get at least 32 communities with at least 2 nodes and less than 7 nodes.

I'm not sure why its not working.

Thanks for your help!!

On Wed, Feb 4, 2015 at 8:02 PM, Chris Watson <address@hidden> wrote:

Ah indeed you are correct. Your code should work fine...

On Wed, Feb 4, 2015 at 7:59 PM, Gábor Csárdi <address@hidden> wrote:

On Wed, Feb 4, 2015 at 7:53 PM, Chris Watson <address@hidden> wrote:

Again, you need to adjust parentheses.

which(c1$csize < 8) & which(c1$csize > 2)

This is actually not good, which() returns a numeric vector, so a logical 'and' on it does not make much sense.

Again, what is wrong with 

right_size <- which(sizes(wc) < 8 & sizes(wc) > 1)

subg <- induced.subgraph(y, which(membership(wc) %in% right_size))

?

G.

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