Tools to visualize topologies of D-Wave QPUs and weighted :term:`graph` problems on them.
.. currentmodule:: dwave_networkx
Note
Some functionality requires NumPy and/or Matplotlib.
.. automodule:: dwave_networkx.drawing.chimera_layout
.. autosummary:: :toctree: generated/ chimera_layout chimera_node_placer_2d draw_chimera draw_chimera_embedding draw_chimera_yield
This example uses the :func:`.chimera_layout()` function to show the positions of nodes of a simple 5-node NetworkX graph in a Chimera lattice. It then uses the :func:`.chimera_graph()` and :func:`.draw_chimera()` functions to display those positions on a Chimera unit cell.
>>> import networkx as nx
>>> import dwave_networkx as dnx
>>> import matplotlib.pyplot as plt
>>> H = nx.Graph()
>>> H.add_nodes_from([0, 4, 5, 6, 7])
>>> H.add_edges_from([(0, 4), (0, 5), (0, 6), (0, 7)])
>>> pos=dnx.chimera_layout(H)
>>> pos
{0: array([ 0. , -0.5]),
4: array([ 0.5, 0. ]),
5: array([ 0.5 , -0.25]),
6: array([ 0.5 , -0.75]),
7: array([ 0.5, -1. ])}
>>> # Show graph H on a Chimera unit cell
>>> plt.ion()
>>> G=dnx.chimera_graph(1, 1, 4) # Draw a Chimera unit cell
>>> dnx.draw_chimera(G)
>>> dnx.draw_chimera(H, node_color='b', node_shape='*', style='dashed', edge_color='b', width=3)
>>> # matplotlib commands to add labels to graphic not shown
Graph H (blue) overlaid on a Chimera unit cell (red nodes and black edges),
which is rendered in a cross layout.
.. automodule:: dwave_networkx.drawing.pegasus_layout
.. autosummary:: :toctree: generated/ draw_pegasus draw_pegasus_embedding draw_pegasus_yield pegasus_layout pegasus_node_placer_2d
This example uses the :func:`.draw_pegasus()` function to show the positions of nodes of a simple 5-node graph on a small Pegasus lattice.
>>> import dwave_networkx as dnx
>>> import matplotlib.pyplot as plt
>>> G = dnx.pegasus_graph(2)
>>> H = dnx.pegasus_graph(2, node_list=[4, 40, 41, 42, 43],
edge_list=[(4, 40), (4, 41), (4, 42), (4, 43)])
>>> # Show graph H on a small Pegasus lattice
>>> plt.ion()
>>> # Show graph H on a small Pegasus lattice
>>> plt.ion()
>>> dnx.draw_pegasus(G, with_labels=True, crosses=True, node_color="Yellow")
>>> dnx.draw_pegasus(H, crosses=True, node_color='b', style='dashed',
edge_color='b', width=3)
Graph H (blue) overlaid on a small Pegasus lattice (yellow nodes and black edges),
which is rendered in a cross layout.
.. automodule:: dwave_networkx.drawing.zephyr_layout
.. autosummary:: :toctree: generated/ draw_zephyr draw_zephyr_embedding draw_zephyr_yield zephyr_layout zephyr_node_placer_2d
This example uses the :func:`.draw_zephyr_embedding` function to show the positions of a five-node clique on a small Zephyr graph.
>>> import dwave_networkx as dnx
>>> import matplotlib.pyplot as plt
>>> import networkx as nx
...
>>> G = dnx.zephyr_graph(1)
>>> embedding = {"N1": [13, 44], "N2": [11], "N3": [41], "N4": [40], "N5": [9, 37]}
...
>>> plt.ion()
>>> dnx.draw_zephyr_embedding(G, embedding, show_labels=True)
Five-node clique embedded in a small Zephyr graph.