Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/smetric.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 import networkx as nx |
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2 |
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3 |
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4 def s_metric(G, normalized=True): |
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5 """Returns the s-metric of graph. |
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6 |
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7 The s-metric is defined as the sum of the products deg(u)*deg(v) |
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8 for every edge (u,v) in G. If norm is provided construct the |
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9 s-max graph and compute it's s_metric, and return the normalized |
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10 s value |
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11 |
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12 Parameters |
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13 ---------- |
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14 G : graph |
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15 The graph used to compute the s-metric. |
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16 normalized : bool (optional) |
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17 Normalize the value. |
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18 |
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19 Returns |
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20 ------- |
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21 s : float |
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22 The s-metric of the graph. |
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23 |
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24 References |
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25 ---------- |
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26 .. [1] Lun Li, David Alderson, John C. Doyle, and Walter Willinger, |
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27 Towards a Theory of Scale-Free Graphs: |
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28 Definition, Properties, and Implications (Extended Version), 2005. |
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29 https://arxiv.org/abs/cond-mat/0501169 |
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30 """ |
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31 if normalized: |
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32 raise nx.NetworkXError("Normalization not implemented") |
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33 # Gmax = li_smax_graph(list(G.degree().values())) |
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34 # return s_metric(G,normalized=False)/s_metric(Gmax,normalized=False) |
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35 # else: |
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36 return float(sum([G.degree(u) * G.degree(v) for (u, v) in G.edges()])) |