RpsiXML (version 2.8.0)

availableXrefs: Get cross reference(s) of interactors from PSI-MI 2.5 files

Description

PSI-MI 2.5 data exchange format encourages data providers to encode cross referenes of the interactors into the file, which prove valuable for annotating the data. These functions help finding out the available cross references of interactors.

Usage

availableXrefs(x,...) xref(object)

Arguments

x
for availableXrefs, 'x' can either be an object of psimi25Interactor-class, link{psimi25InteractionEntry} or a list of psimi25Interactor-class objects.

for xref, 'object' should be an object of psimi25Interactor-class

object
New interface of RpsiXML uses ‘object’ uniformly.
...
intersect, logical option. If set to TRUE then only the cross references available for every interactor are returned (intersected), otherwise all the cross references are unioned and returned. See the examples

Value

xref
Returns a matrix with two columns: db (external database name) and id (external database index)
availableXrefs
A vector of characters, the names of external databases referenced in the file

Details

If psimi25InteractionEntry is provided as the parameter of availableXrefs, an option named "intersect" can be set to extract only those cross references intersected among all the interactors, namely the ones assigned in every interactor. Please see the examples.

Examples

Run this code
xmlDir <- system.file("/extdata/psi25files",package="RpsiXML")

hprdxml <- file.path(xmlDir, "hprd_200709_test.xml")
hprdSet <- parsePsimi25Interaction(hprdxml, HPRD.PSIMI25)
hprdInteractors <- interactors(hprdSet)

availableXrefs(hprdSet)
xref(hprdInteractors[[1]])
availableXrefs(hprdInteractors[[1]])

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