File:Graph for example adjacency matrix.svg

Summary
Graphviz dot source:

digraph { rankdir = "LR" edge [fontname="DejaVu Serif", fontcolor="blue",fontsize=17 ]   node [shape=circle, fontname="DejaVu Serif",fontsize=17] 1 [label="1 (source)"] 4 [label="4 (sink)"]

1 -> 2 [label="e1"] 1 -> 3 [label="e2"] 2 -> 3 [label="e3"] 2 -> 4 [label="e4"] 3 -> 4 [label="e5"] 4 -> 1 [label="e6",constraint=false]

}