make weightedEdge a weightedLine

cmd/internal/markov/absorbing.go

@@ -140,10 +140,10 @@ func (g *AbsorbingMarkovChain) AdjacencyMatrix() *mat.Dense {
 	return a
 }
 
-// NewEdge returns a weightedEdge that can be added to the Markov chain.
-func (g *AbsorbingMarkovChain) NewEdge(from, to graph.Node) graph.Edge {
+// NewLine returns a weightedLine that can be added to the Markov chain.
+func (g *AbsorbingMarkovChain) NewLine(from, to graph.Node) graph.Line {
 	e := g.WeightedDirectedGraph.NewWeightedLine(from, to, math.NaN()).(multi.WeightedLine)
-	return &weightedEdge{WeightedLine: e}
+	return &weightedLine{WeightedLine: e}
 }
 
 // NewNode returns a Node that can be added to the Markov chain.
@@ -151,7 +151,7 @@ func (g *AbsorbingMarkovChain) NewNode() graph.Node {
 	return &Node{Node: g.WeightedDirectedGraph.NewNode()}
 }
 
-// SetEdge adds a weighted edge to the Markov chain.
-func (g *AbsorbingMarkovChain) SetEdge(e graph.Edge) {
-	g.WeightedDirectedGraph.SetWeightedLine(e.(*weightedEdge))
+// SetLine adds a weighted edge to the Markov chain.
+func (g *AbsorbingMarkovChain) SetLine(e graph.Line) {
+	g.WeightedDirectedGraph.SetWeightedLine(e.(*weightedLine))
 }

cmd/internal/markov/nodes_edges.go

@@ -42,25 +42,18 @@ func (n *Node) DOTID() string {
 	return n.dotID
 }
 
-// weightedEdge is a DOT-aware multi.WeightedLine. By being a
+// weightedLine is a DOT-aware multi.WeightedLine. By being a
 // multi.WeightedLine, it allows for self-loops, which are important for
 // absorbing Markov chains.
 // TODO: this is a little confusing, maybe just have checks in the code that
 // there's only one line in each edge?
-type weightedEdge struct {
+type weightedLine struct {
 	multi.WeightedLine
 }
 
-// ReversedEdge returns a new weightedEdge with the same weight, but the
-// direction reversed. It exists mainly to satisfy the graph.Edge interface.
-func (e *weightedEdge) ReversedEdge() graph.Edge {
-	revLine := multi.WeightedLine{F: e.T, T: e.F, W: e.W}
-	return &weightedEdge{WeightedLine: revLine}
-}
-
 // SetAttribute enables storing the weight read from a DOT file. It errors if
-// an attribute is read that can't be stored in a weightedEdge.
-func (e *weightedEdge) SetAttribute(attr encoding.Attribute) error {
+// an attribute is read that can't be stored in a weightedLine.
+func (e *weightedLine) SetAttribute(attr encoding.Attribute) error {
 	var err error
 
 	switch attr.Key {

cmd/root.go

@@ -59,7 +59,7 @@ func parse(cmd *cobra.Command, args []string) {
 	}
 
 	graph := markov.NewAbsorbingMarkovChain()
-	err = dot.Unmarshal(data, graph)
+	err = dot.UnmarshalMulti(data, graph)
 	if err != nil {
 		panic(err)
 	}