/usr/lib/R/site-library/igraph/demo/cohesive.R is in r-cran-igraph 0.7.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | pause <- function() {
cat("Press ENTER/RETURN/NEWLINE to continue.")
readLines(n=1)
invisible()
}
### The Zachary Karate club network
karate <- graph.famous("Zachary")
summary(karate)
pause()
### Create a layout that is used from now on
karate$layout <- layout.auto(karate)
plot(karate)
pause()
### Run cohesive blocking on it
cbKarate <- cohesive.blocks(karate)
cbKarate
pause()
### Plot the results and all the groups
plot(cbKarate, karate)
pause()
### This is a bit messy, plot them step-by-step
### See the hierarchy tree first
hierarchy(cbKarate)
plotHierarchy(cbKarate)
## Plot the first level, blocks 1 & 2
plot(cbKarate, karate, mark.groups=blocks(cbKarate)[1:2+1],
col="cyan")
pause()
### The second group is simple, plot its more cohesive subgroup
plot(cbKarate, karate, mark.groups=blocks(cbKarate)[c(2,5)+1], col="cyan")
pause()
### The first group has more subgroups, plot them
sub1 <- blocks(cbKarate)[parent(cbKarate)==1]
sub1
plot(cbKarate, karate, mark.groups=sub1)
pause()
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