I'm a new R/igraph user. While trying out the example from
http://www.ats.ucla.edu/stat/r/faq/snplot.htm I receive the error "could
not find function 'is'" after executing the graph.adjacency function.
Now when I look at the code for graph.adjacency, I see:
if (is(adjmatrix, "Matrix")) {
Since I have little experience with R I can not be sure, but shouldn't
this be:
if (is.matrix(adjmatrix)) {
I've looked for this in the bug lists but it was not mentioned... rather
doubting it's a bug, but don't have a clue otherwise. Hope you guys can
help me.
See below for my sessionInfo.
R version 2.12.1 (2010-12-16)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=C LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=en_US.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] splines graphics stats utils grDevices tcltk
base
other attached packages:
[1] Rcmdr_1.6-2 car_2.0-7 igraph_0.5.5-4 survival_2.36-2
[5] nnet_7.3-1 MASS_7.3-9
Also, library() reports:
Packages in library '/home/daigu/R/x86_64-pc-linux-gnu-library/2.12':
igraph Network analysis and visualization
...
Should the package perhaps be in another location?
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