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<head><title>getEdge -- gets the n-th edge in a (hyper)graph</title>
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<div><h1>getEdge -- gets the n-th edge in a (hyper)graph</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>E = getEdge(H,n)</tt></div>
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<li><div class="single">Inputs:<ul><li><span><tt>H</tt>, <span>a <a href="___Hyper__Graph.html">hypergraph</a></span></span></li>
<li><span><tt>n</tt>, <span>an <a href="../../Macaulay2Doc/html/___Z__Z.html">integer</a></span>, an index of an edge in <tt>H</tt></span></li>
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<li><div class="single">Outputs:<ul><li><span><tt>E</tt>, <span>a <a href="../../Macaulay2Doc/html/___List.html">list</a></span>, the <tt>n</tt>-th edge of <tt>H</tt></span></li>
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<div class="single"><h2>Description</h2>
<div><div>This function returns the n<sup>th</sup> edge of the (hyper)graph.</div>
<table class="examples"><tr><td><pre>i1 : S = QQ[a..f];</pre>
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<tr><td><pre>i2 : g = cycle S
o2 = Graph{edges => {{a, b}, {b, c}, {c, d}, {d, e}, {e, f}, {a, f}}}
ring => S
vertices => {a, b, c, d, e, f}
o2 : Graph</pre>
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<tr><td><pre>i3 : edges g
o3 = {{a, b}, {b, c}, {c, d}, {d, e}, {e, f}, {a, f}}
o3 : List</pre>
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<tr><td><pre>i4 : getEdge (g,3) -- counting starts from 0, so the 4th element in the above list
o4 = {d, e}
o4 : List</pre>
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<tr><td><pre>i5 : h = hyperGraph {a*b*c*d,d*e,a*f*c,a*d*f}
o5 = HyperGraph{edges => {{a, b, c, d}, {d, e}, {a, c, f}, {a, d, f}}}
ring => S
vertices => {a, b, c, d, e, f}
o5 : HyperGraph</pre>
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<tr><td><pre>i6 : getEdge (h,0) -- first edge
o6 = {a, b, c, d}
o6 : List</pre>
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<div class="single"><h2>See also</h2>
<ul><li><span><a href="_edges.html" title="gets the edges of a (hyper)graph">edges</a> -- gets the edges of a (hyper)graph</span></li>
<li><span><a href="_get__Edge__Index.html" title="finds the index of an edge in a HyperGraph">getEdgeIndex</a> -- finds the index of an edge in a HyperGraph</span></li>
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<div class="waystouse"><h2>Ways to use <tt>getEdge</tt> :</h2>
<ul><li>getEdge(HyperGraph,ZZ)</li>
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