Nothing

```
subnetworks <-
function(theta)
{
K = length(theta)
subnets = list()
for(k in 1:K)
{
subnets[[k]] = list()
m = theta[[k]]
p=dim(m)[1]
used = c()
tempblock = c() # vector of nodes in the current block
indices = 1:(p+1)
i=1
snumber = 1
iters = 1
while((i<p+1)&(iters<p+1))
{
# find everything connected to i:
tempblock = (1:p)==i
tempblocksum = 0
# loop to find all neighbors of neighbors of...
while(tempblocksum!=sum(tempblock))
{
# save the size of the block at the beginning of this iteration
tempblocksum = sum(tempblock)
# matrix of all neighbors of tempblock
neighbors = m[tempblock,]!=0
# update tempblock to include all new neighbors
tempblock = colSums(rbind(neighbors,rep(0,p)))>0
}
# save the names of the features in tempblock:
tb = names(tempblock)[tempblock]
if(length(tb)>1)
{
subnets[[k]][[snumber]] = tb
snumber = snumber+1
}
# mark the nodes as used:
used = c(used,(1:p)[tempblock])
# update i to lowest unused index:
i = min(setdiff(indices,used))
iters=iters+1
} #end loop
}
return(subnets)
}
```

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