dhart.spatialstructures.Graph.attrs_to_costs

Graph.attrs_to_costs(attribute_string: str, cost_string: str, direction: Direction)

Generate a cost set based on a set of node parameters

Parameters:

• attribute_string (str) – Attribute to create a new cost set from.]

• cost_string (str) – Key for the newly generated cost set.

• direction (Direction) – Direction to use for calculating the cost of any edge. For example INCOMING will use the cost of the node being traveled to by the edge.

Raises:

KeyError – attribute_string was not the key of any node attribute in the graph

Examples

>>> from dhart.spatialstructures import Graph, Direction
>>> g = Graph()
>>> g.AddEdgeToGraph(0, 1, 100)
>>> g.AddEdgeToGraph(0, 2, 50)
>>> g.AddEdgeToGraph(1, 2, 20)
>>> csr = g.CompressToCSR()
>>>
>>> attr = "Test"
>>> ids = [0, 1, 2]
>>> scores = ["0", "100", "200"]
>>> g.add_node_attributes(attr, ids, scores)
>>>
>>> # Get attribute scores from the graph
>>> out_attrs = g.get_node_attributes(attr)
>>>
>>> g.attrs_to_costs(attr, "attr_cost", Direction.INCOMING)
>>>
>>> g.GetEdgeCost(1, 2, "attr_cost")
200.0