Hi, I encountered the following problem with the package graph. Maybe someone can tell me what I'm doing wrong. > library("graph") > > sessionInfo() R version 2.8.1 (2008-12-22) i486-pc-linux-gnu locale: LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US .UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_N AME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTI FICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] graph_1.20.0 loaded via a namespace (and not attached): [1] cluster_1.11.12 tools_2.8.1 > > g <- new("graphNEL", nodes = as.character(1:10), edgemode="directed") > g <- addEdge("1", "10", g, 1) > combineNodes(as.character(1:5), g, "1") Error in graph:::.normalizeEdges(from, to) : 'from' must be length 1 or 1 for this call. > > combineNodes(c("1","2"), g, "X") Error in graph:::.normalizeEdges(from, to) : 'from' must be length 1 or 1 for this call. Thanks, Michael -- Michael Hahsler email: michael at hahsler.net web: http://michael.hahsler.net

Hi Michael, this was a bug in the graph package which should now be fixed in the latest devel version (1.21.5) I also fixed the bug in edgeWeights which will now correctly return an empty list for all nodes in index instead of a list for all nodes of the whole graph, in the boundary case of a graph without any edges. Thanks for pointing this out, Florian Michael Hahsler wrote: > Hi, > > I encountered the following problem with the package graph. Maybe > someone can tell me what I'm doing wrong. > > > > library("graph") > > > > sessionInfo() > R version 2.8.1 (2008-12-22) > i486-pc-linux-gnu > > locale: > LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_ US.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC _NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDEN TIFICATION=C > > > attached base packages: > [1] stats graphics grDevices utils datasets methods base > > other attached packages: > [1] graph_1.20.0 > > loaded via a namespace (and not attached): > [1] cluster_1.11.12 tools_2.8.1 > > > > g <- new("graphNEL", nodes = as.character(1:10), edgemode="directed") > > g <- addEdge("1", "10", g, 1) > > combineNodes(as.character(1:5), g, "1") > Error in graph:::.normalizeEdges(from, to) : > 'from' must be length 1 or 1 for this call. > > > > combineNodes(c("1","2"), g, "X") > Error in graph:::.normalizeEdges(from, to) : > 'from' must be length 1 or 1 for this call. > > > Thanks, > Michael > -- Florian Hahne, PhD Computational Biology Program Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M2-B876 PO Box 19024 Seattle, Washington 98109-1024 206-667-3148 fhahne at fhcrc.org