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<a href="#NAME">NAME</a>
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<a href="#SYNOPSIS">SYNOPSIS</a>
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<a href="#DESCRIPTION">DESCRIPTION</a>
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<a href="#PARAMETERS">PARAMETERS</a>
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<a href="#OUTPUT">OUTPUT</a>
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<a href="#EXAMPLES">EXAMPLES</a>
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<li class='tl'>shortest(1)</li>
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<li class='tc'>www.complex-networks.net</li>
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<li class='tr'>shortest(1)</li>
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</ol>
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<h2 id="NAME">NAME</h2>
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<p class="man-name">
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<code>shortest</code> - <span class="man-whatis">Compute the distance between one node and all the other nodes of a graph</span>
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</p>
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<h2 id="SYNOPSIS">SYNOPSIS</h2>
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<p><code>shortest</code> <var>graph_in</var> <var>node</var> [SHOW]</p>
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<h2 id="DESCRIPTION">DESCRIPTION</h2>
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<p><code>shortest</code> computes the distance (and the shortest paths) between a
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given node and all the other nodes of an undirected graph provided as
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input. The program implements the Breadth-First Search algorithm.</p>
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<h2 id="PARAMETERS">PARAMETERS</h2>
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<dl>
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<dt><var>graph_in</var></dt><dd><p> input graph (edge list) if equal to <code>-</code> (dash), read the edge list
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from STDIN.</p></dd>
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<dt class="flush"><var>node</var></dt><dd><p> The label of the node from which distances are to be computed</p></dd>
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<dt class="flush">SHOW</dt><dd><p> If the third (optional) parameter is equal to <code>SHOW</code>, the program
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will dump on the standard error also all the shortest paths
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between <var>node</var> and all the other nodes of the graph</p></dd>
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</dl>
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<h2 id="OUTPUT">OUTPUT</h2>
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<p><code>shortest</code> prints on the standard output the distances betwen <var>node</var>
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and all the other nodes of the graph, in the format:</p>
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<pre><code>d0 d1 d2 d3.....
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</code></pre>
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<p>where <code>d0</code> is the distance to node <code>0</code>, <code>d1</code> is the distance to node
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<code>1</code>, and so forth. If <code>SHOW</code> is given, the list of all the shortest
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paths between <var>node</var> and the other nodes is printed on the standard
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error, one path per line, in the format:</p>
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<pre><code>label0 label1 label2 ... node
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</code></pre>
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<p>where <code>label1</code>, <code>label2</code>, etc. are the labels of a shortest path
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between <code>label0</code> and <var>node</var></p>
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<h2 id="EXAMPLES">EXAMPLES</h2>
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<p>The following command:</p>
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<pre><code> $ shortest er_1000_5000.net 25
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3 4 4 4 2.......
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$
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</code></pre>
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<p>will show on output the distances between node 25 and all the other
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nodes in the graph <code>er_1000_5000.net</code>. If we invoke the program with:</p>
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<pre><code> $ shortest er_1000_5000.net 25 SHOW 2>er_1000_5000.net_25_paths
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3 4 4 4 2.......
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$
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</code></pre>
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<p>the program will dump on STDERR the list of all the shortest paths
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between 'node' and all the other nodes of the graph. Since we used the
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redirection <code>2>er_1000_5000.net_25_paths</code> (which can be read "redirect
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STDERR to 'er_1000_5000.net_25_paths' "), the list of shortest
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paths will be written to the file <code>er_1000_5000.net_25_paths</code>.</p>
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<h2 id="SEE-ALSO">SEE ALSO</h2>
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<p><span class="man-ref">dijkstra<span class="s">(1)</span></span>, <span class="man-ref">bet_dependency<span class="s">(1)</span></span>, <span class="man-ref">betweenness<span class="s">(1)</span></span>, <span class="man-ref">shortest_avg_max_hist<span class="s">(1)</span></span></p>
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<h2 id="REFERENCES">REFERENCES</h2>
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<ul>
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<li><p>V. Latora, V. Nicosia, G. Russo, "Complex Networks: Principles,
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Methods and Applications", Chapter 3, Cambridge University Press
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(2017)</p></li>
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<li><p>V. Latora, V. Nicosia, G. Russo, "Complex Networks: Principles,
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Methods and Applications", Appendix 6, Cambridge University Press
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(2017)</p></li>
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</ul>
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<h2 id="AUTHORS">AUTHORS</h2>
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<p>(c) Vincenzo 'KatolaZ' Nicosia 2009-2017 <code><v.nicosia@qmul.ac.uk></code>.</p>
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<ol class='man-decor man-foot man foot'>
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<li class='tl'>www.complex-networks.net</li>
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<li class='tc'>September 2017</li>
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<li class='tr'>shortest(1)</li>
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</ol>
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