download.kegg {pathview} | R Documentation

## Download KEGG pathway graphs and associated KGML data

### Description

This is the downloader function for KEGG pathways, automatically download graph images and associated KGML data.

### Usage

    download.kegg(pathway.id = "00010", species = "hsa", kegg.dir = ".",
    file.type=c("xml", "png"))

### Arguments

`pathway.id` | character, 5-digit KEGG pathway IDs. Default pathway.id="00010".
`species` | character, either the KEGG code, scientific name or the common name of the target species. When KEGG ortholog pathway is considered, species="ko". Default species="hsa", it is equivalent to use either "Homo sapiens" (scientific name) or "human" (common name).
`kegg.dir` | character, the directory of KEGG pathway data file (.xml) and image file (.png). Default kegg.dir="." (current working directory).
`file.type` | character, the file type(s) to be downloaded, either KEGG pathway data file (xml) or image file (png). Default include both types.

### Details

Species can be specified as either kegg code, scientific name or the common name. Scientific name and the common name are always mapped to kegg code first. Length of species should be either 1 or the same as pathway.id, if not, the same set of pathway.id will be applied to all species.

### Value

a named character vector, either "succeed" or "failed", indicating the download status of corresponding pathways.

### Author(s)

Weijun Luo <luo_weijun@yahoo.com>

### References

Luo, W. and Brouwer, C., Pathview: an R/Bioconductor package for pathway based data integration and visualization. Bioinformatics, 2013, 29(14): 1830-1831, doi: 10.1093/bioinformatics/btt285

### See Also

`pathview` the main function, `node.info` the parser,

### Examples

    data(demo.paths)
    sel.2paths=demo.paths$sel.paths[1:2]
    download.kegg(pathway.id = sel.2paths, species = "hsa")
    #pathway files should be downloaded into current working directory

[Package pathview version 1.32.0 Index]