getEdgeAttribute

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Description

Node and edge attributes are usually added to a Cytoscape network by defining them on the graph used to construct a CytoscapeWindow. The small family of methods described here, however, provide another avenue for adding an edge attribute, for learning which are currently defined, and for deleting an edge attribute.

Note that edge (and node) attibutes are defined, not just for a specific, single CytoscapeWindow, but for an entire Cytoscape application session.Thus if you have two nodes (or edges) with the same ID in two different windows, adding a node attribute results in both nodes having that attribute.

Usage

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getEdgeAttribute(obj, edge.name, attribute.name)

Arguments

obj

a CytoscapeConnectionClass object or CytoscapeWindow object.

edge.name

a character string specifying the Cytoscape-style name of an edge.

attribute.name

a character string, the name of the attribute you wish to retrieve.

Value

The attribute in question, which may be of any scalar type.

Author(s)

Tanja Muetze, Georgi Kolishovski, Paul Shannon

See Also

getEdgeAttributeNames deleteEdgeAttribute

Examples

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  # first, delete existing windows to save memory:
  deleteAllWindows(CytoscapeConnection())

  window.name = 'demo.getEdgeAttribute'
  cw = CytoscapeWindow (window.name, graph=makeSimpleGraph ())
  setDefaultEdgeLineWidth (cw, 5);
  displayGraph (cw)
  redraw (cw)
  layoutNetwork(cw)

  score.bc = getEdgeAttribute (cw, "B (synthetic lethal) C", 'score')
  print (paste ("should be -12: ", score.bc))

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