Writing the graph to a file in some format
write_graph is a general function for exporting graphs to foreign
file formats, however not many formats are implemented right now.
write_graph(graph, file, format = c("edgelist", "pajek", "ncol", "lgl", "graphml", "dimacs", "gml", "dot", "leda"), ...)
- The graph to export.
- A connection or a string giving the file name to write the graph to.
- Character string giving the file format. Right now
dimacsare implemented. As of igraph 0.4 this argu
- Other, format specific arguments, see below.
- A NULL, invisibly.
Edge list format
edgelist format is a simple text file,
with one edge in a line, the two vertex ids separated by a space character.
The file is sorted by the first and the second column. This format has no
Adai AT, Date SV, Wieland S, Marcotte EM. LGL: creating a map of protein function with an algorithm for visualizing very large biological networks. J Mol Biol. 2004 Jun 25;340(1):179-90.
g <- make_ring(10) write_graph(g, "/tmp/g.txt", "edgelist")