spaghetti.Network.count_per_link¶

Network.count_per_link(self, obs_on, graph=True)[source]¶

Compute the counts per arc or edge (link).

Parameters

obs_on_networkdict

Dictionary of observations on the network. Either {(link):{pt_id:(coords)}} or {link:[(coord),(coord),(coord)]}

Returns

countsdict

{(link):count}

Examples

Note that this passes the obs_to_arc or obs_to_edge attribute of a point pattern snapped to the network.

>>> import spaghetti as spgh
>>> ntw = spgh.Network(examples.get_path('streets.shp'))
>>> ntw.snapobservations(examples.get_path('crimes.shp'),
...                                        'crimes',
...                                         attribute=True)

>>> counts = ntw.count_per_link(ntw.pointpatterns['crimes']
...                             .obs_to_arc, graph=False)
>>> counts[(140, 142)]
10

>>> s = sum([v for v in list(counts.values())])
>>> s
287