Description Usage Arguments Value Author(s) References See Also Examples
Compute the projection of a graph, provided as an
igraph
object, on the grid of the somRes
object.
1 | projectIGraph(object, init.graph, ...)
|
object |
a |
init.graph |
an igraph whose number of vertices is equal
to the clustering length of the |
... |
Not used. |
The result is an igraph
which vertexes are the
clusters (the clustering is thus understood as a vertex clustering) and the
edges are the counts of edges in the original graph between two vertices
corresponding to the two clusters in the projected graph or, if
init.graph
is a weighted graph, the sum of the weights between the
pairs of vertices corresponding to the two clusters.
The resulting igraph object's attributes are:
the graph attribute layout
which provides the layout of the
projected graph according to the grid of the SOM;
the vertex attributes name
and size
which, respectively
are the vertex number on the grid and the number of vertexes included in
the corresponding cluster;
the edge attribute weight
which gives the number of edges (or
the sum of the weights) between the vertexes of the two corresponding
clusters.
Madalina Olteanu olteanu@ceremade.dauphine.fr
Nathalie Vialaneix nathalie.vialaneix@inrae.fr
Olteanu M., Villa-Vialaneix N. (2015) Using SOMbrero for clustering and visualizing graphs. Journal de la Société Française de Statistique, 156, 95-119.
projectIGraph.somSC
which uses the results of a
super-clustering to obtain another projected graph. plot.somRes
with the option type="graph"
or plot.somSC
with the
option type="projgraph"
.
1 2 3 4 5 | data(lesmis)
set.seed(7383)
mis.som <- trainSOM(x.data=dissim.lesmis, type="relational", nb.save=10)
proj.lesmis <- projectIGraph(mis.som, lesmis)
## Not run: plot(proj.lesmis)
|
Loading required package: knitr
Loading required package: igraph
Attaching package: 'igraph'
The following objects are masked from 'package:stats':
decompose, spectrum
The following object is masked from 'package:base':
union
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This is 'SOMbrero' package, v 1.2
Citation details with citation('SOMbrero')
Further information with help(SOMbrero)...
Use sombreroGUI() to start the Graphical Interface.
Warning! This package has been implemented (mostly) by girls.
Default colors may not be suited for men.
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