#!/usr/bin/env python
"""
Graphs with Multiple Components
===============================

For each component, netgraph computes the node and edge layouts separately,
and then arranges the individual components with respect to each other using
`rectangle packing`__.

.. __ : https://github.com/Penlect/rectangle-packer
"""

import matplotlib.pyplot as plt

from itertools import combinations
from netgraph import Graph

edge_list = []

# add 15 2-node components
edge_list.extend([(ii, ii+1) for ii in range(30, 60, 2)])

# add 10 3-node components
for ii in range(60, 90, 3):
    edge_list.extend([(ii, ii+1), (ii, ii+2), (ii+1, ii+2)])

# add a couple of larger components
n = 90
for ii in [10, 20, 30]:
    edge_list.extend(list(combinations(range(n, n+ii), 2)))
    n += ii

nodes = list(range(n))
Graph(edge_list, nodes=nodes, node_size=1, edge_width=0.3, node_layout='circular')
plt.show()