Description Usage Arguments Value Author(s) Examples

The function creates a subgraph with the nodes given in the nodeList or for these nodes including their direct neighbors.

1 | ```
subNetwork(nodeList, network, neighbors=c("none", "first"))
``` |

`nodeList` |
Character vector of nodes, contained in the subgraph. |

`network` |
Graph that is used for subgraph extraction. |

`neighbors` |
Neighborhood, that is chosen for the subgraph extraction. "none" are only the selected nodes, "first" includes the direct neighbors of the selected nodes. |

A graph object.

Marcus Dittrich

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | ```
library(igraph)
el <- cbind(c("a", "b", "c", "d", "e", "f", "d"), c("b", "c", "d", "e", "f", "a", "b"))
graph <- graph.edgelist(el, directed=TRUE)
node.list <- c("a", "b", "c")
graph2 <- subNetwork(nodeList=node.list, network=graph)
## Not run: par(mfrow=c(1,2));
plotModule(graph);
plotModule(graph2)
## End(Not run)
# or in graphNEL format:
graph3 <- igraph.to.graphNEL(graph)
graph4 <- subNetwork(nodeList=node.list, network=graph3)
graph3
graph4
``` |

```
Loading required package: graph
Loading required package: BiocGenerics
Loading required package: parallel
Attaching package: 'BiocGenerics'
The following objects are masked from 'package:parallel':
clusterApply, clusterApplyLB, clusterCall, clusterEvalQ,
clusterExport, clusterMap, parApply, parCapply, parLapply,
parLapplyLB, parRapply, parSapply, parSapplyLB
The following objects are masked from 'package:stats':
IQR, mad, sd, var, xtabs
The following objects are masked from 'package:base':
Filter, Find, Map, Position, Reduce, anyDuplicated, append,
as.data.frame, basename, cbind, colMeans, colSums, colnames,
dirname, do.call, duplicated, eval, evalq, get, grep, grepl,
intersect, is.unsorted, lapply, lengths, mapply, match, mget,
order, paste, pmax, pmax.int, pmin, pmin.int, rank, rbind,
rowMeans, rowSums, rownames, sapply, setdiff, sort, table, tapply,
union, unique, unsplit, which, which.max, which.min
Loading required package: RBGL
Attaching package: 'igraph'
The following objects are masked from 'package:RBGL':
bfs, dfs, transitivity
The following objects are masked from 'package:graph':
degree, edges, intersection, union
The following objects are masked from 'package:BiocGenerics':
normalize, path, union
The following objects are masked from 'package:stats':
decompose, spectrum
The following object is masked from 'package:base':
union
A graphNEL graph with directed edges
Number of Nodes = 6
Number of Edges = 7
A graphNEL graph with directed edges
Number of Nodes = 3
Number of Edges = 2
```

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