mergeKEGGgraphs: Merge KEGG graphs, also merging KEGGNode and KEGGEdge attributes

Description

mergeKEGGgraphs extends function mergeGraphs and merges a list of KEGG graphs. Both mergeGraphs and mergeKEGGgraphs can be used to merge graphs, while the latter form is able to merge the nodes and edges attributes from KEGG, so that the nodes and edges have a one-to-one mapping to the results from getKEGGnodeData and getKEGGEdgeData.

See details below.

Usage

mergeKEGGgraphs(list, edgemode = "directed")

Arguments

list

A list of named KEGG graphs

edgemode

character, 'directed' by default

Value

A graph with nodeData and edgeData

Details

mergeGraphs discards the node or edge attributes, hence getKEGGnodeData or getKEGGedgeData will return NULL on the resulting graph.

mergeKEGGgraphs calls mergeGraphs first to merge the graphs, then it also merges the KEGGnodeData and KEGGedgeData.so that they are one-to-one mapped to the nodes and edges in the merged graph.

Examples

Run this code

sfile <- system.file("extdata/hsa04010.xml",package="KEGGgraph")
gR <- parseKGML2Graph(sfile,expandGenes=TRUE)

wntfile <- system.file("extdata/hsa04310.xml",package="KEGGgraph")
wntR <- parseKGML2Graph(wntfile, expandGenes=TRUE)

graphlist <- list(mapkG=gR, wntG=wntR)
mergedKEGG <- mergeKEGGgraphs(graphlist)

mergedKEGG

## list containing NULL works also
nlist <- list(gR, wntR, NULL)
nmergedKEGG <- mergeKEGGgraphs(nlist)