Entering edit mode
Royce Francis
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20
@royce-francis-4966
Last seen 10.3 years ago
Hello all,
I have been studying the use of Bayesian Belief Networks, and have
found Marco Scutari's package, "bnlearn," very helpful. While I was
learning his package, I had been using graphviz to plot the networks
that were learned.
Recently, I have not been able to plot any networks using graphviz
because each time I call the function, graphviz.plot, I receive a
message indicating that a segmentation fault has occurred. I
originally thought this was caused by updating R to 2.14.0, but when I
reverted to 2.13.0, the segmentation faults persisted.
Here is a snippet of code using an example in Scutari's JSS paper that
will produce the error in my setup (and the corresponding output):
> library("bnlearn")
> library(Rgraphviz)
> data(learning.test)
> bn.hc <- hc(learning.test,score="aic")
> graphviz.plot(bn.hc)
*** caught segfault ***
address 0x10, cause 'memory not mapped'
Traceback:
1: .Call("Rgraphviz_doLayout", graph, as.integer(type), PACKAGE =
"Rgraphviz")
2: graphLayout(g)
3: agopen(x, name = name, layoutType = layoutType, recipEdges =
recipEdges, nodeAttrs = nodeAttrs, edgeAttrs = edgeAttrs, attrs =
attrs, ...)
4: layoutFun(x, ...)
5: layoutGraph(graph.obj, attrs = attrs, nodeAttrs = node.attrs,
layoutType = layout)
6: graphviz.backend(nodes = nodes, arcs = arcs, highlight =
highlight, layout = layout, shape = shape, main = main, sub = sub)
7: graphviz.plot(bn.hc)
Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit
3: exit R without saving workspace
4: exit R saving workspace
Selection:
I would greatly appreciate any help resolving this error, or any
suggestions for alternative plotting methods. I find the "plot"
function completely inadequate and would much rather use graphviz to
report my findings.
Thank you in advance,
Royce
