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# reading graph in NCOL format
Code
read_graph(ncol_path, "ncol")
Output
IGRAPH UN-- 3 2 --
+ attr: name (v/c)
+ edges (vertex names):
[1] 0--1 1--2
# reading graph in LGL format
Code
read_graph(lgl_path, "lgl")
Output
IGRAPH UN-- 3 2 --
+ attr: name (v/c)
+ edges (vertex names):
[1] 0--1 1--2
# reading graph, unused argument
Code
read_graph(lgl_path, "lgl", useless = 1)
Condition
Error in `read.graph.lgl()`:
! unused argument (useless = 1)
# reading graph in unsupported format
Code
read_graph("bla", format = "blop")
Condition
Error in `read_graph()`:
! `format` must be one of "edgelist", "pajek", "ncol", "lgl", "graphml", "dimacs", "graphdb", "gml", or "dl", not "blop".
# writing graph in unsupported format
Code
write_graph(g, file, format = "blop")
Condition
Error in `write_graph()`:
! `format` must be one of "edgelist", "pajek", "ncol", "lgl", "graphml", "dimacs", "gml", "dot", or "leda", not "blop".
# graph_from_graphdb works
Code
g <- graph_from_graphdb(nodes = 1000)
---
Code
g <- graph_from_graphdb()
Condition
Error in `graph_from_graphdb()`:
! Either `nodes`' or ``url`' must be non-null.
---
Code
g <- graph_from_graphdb(nodes = 10, prefix = "not_existing")
Condition
Error in `graph_from_graphdb()`:
! not_existing is not a valid prefix.
i Must be one of iso, si6, mcs10, mcs30, mcs50, mcs70, and mcs90.
---
Code
g <- graph_from_graphdb(nodes = 10, type = "not_existing")
Condition
Error in `graph_from_graphdb()`:
! not_existing is not a valid graph type.
i Must be one of r001, r005, r01, r02, m2D, m2Dr2, m2Dr4, m2Dr6, m3D, m3Dr2, m3Dr4, m3Dr6, m4D, m4Dr2, m4Dr4, m4Dr6, b03, b03m, ..., b09, and b09m.
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