[Bioc-devel] Question graph package 1.10.2
Markus Ruschhaupt
m.ruschhaupt at dkfz-heidelberg.de
Mon May 15 18:23:31 CEST 2006
Hi,
I have a question regarding graph package version 1.10.2. I would like
to transform a matrix into a graph and later on transform the graph back
into a matrix. But when I do so, the weights of the edges seems to be
lost. Please have a look at the example:
> library(graph)
> A <- matrix(c(0,0.2,1,0.2,0,0,1,0,0),ncol=3)
> rownames(A) <- colnames(A) <- letters[1:3]
> A
a b c
a 0.0 0.2 1
b 0.2 0.0 0
c 1.0 0.0 0
> as(as(A,"graphNEL"),"matrix")
a b c
a 0 1 1
b 1 0 0
c 1 0 0
> sessionInfo()
Version 2.3.0 (2006-04-24)
i686-pc-linux-gnu
attached base packages:
[1] "methods" "stats" "graphics" "grDevices" "utils" "datasets"
[7] "base"
other attached packages:
graph Ruuid
"1.10.2" "1.10.0"
Is this a bug or is this a feature? I also tested the graph package 1.8.
with R.2.2.1 and this behaved as expected (the weights are included into
the matrix).
Best,
Markus
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