mergeKEGGgraphs {KEGGgraph} | R Documentation

## 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

### 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.

### Value

A graph with nodeData and edgeData

### Note

From version 1.21.1, lists containing NULL should also work.

### Author(s)

Jitao David Zhang mailto:jitao_david.zhang@roche.com

### See Also

`mergeGraphs`

### Examples

    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)

[Package KEGGgraph version 1.50.0 Index]