Here are three ways to make edge labels “fit” (position) better - closer to the edge. Unfortunately, there is no way to rotate any text - make it vertical - but there still ways to have fun:
- print the text characters one-character-on-a-line. Two examples:
13 -- 14 [label="a\ne\ni\no\nu"]
and
52 -- 53 [label="A
E
I
O"]
Giving:
- produce an image file of rotated text and use that image as the label,
like so:
graph straight {
splines=false
node[shape=circle style=filled fillcolor=pink]
edge [fontname=Courier] // somewhat arbitrary
subgraph clusterI {
//
// how these images were created (ImageMagick)
// for a in 0 90 270;do convert -pointsize 22 -trim +repage -rotate -$a label:"Good Data" goodData$a.png;done
//
label="Using Images"
100 -- 101 [shape=plain label=<<TABLE BORDER="0" CELLBORDER="0"><TR><TD><IMG SRC="goodData270.png"/></TD></TR></TABLE>>];
102 -- 103 [shape=plain label=<<TABLE BORDER="0" CELLBORDER="0"><TR><TD><IMG SRC="goodData90.png"/></TD></TR></TABLE>>];
104 -- 105 [shape=plain label=<<TABLE BORDER="0" CELLBORDER="0"><TR><TD><IMG SRC="goodData0.png"/></TD></TR></TABLE>>];
}
}
giving:
- use a GVPR postprocessor (A GVPR program to improve Graphviz edge labels · GitHub) to either
- move the label on-top-of the edge
- move the label anywhere you want, relative to the label’s current position
An example:
graph straight {
splines=false
edge [label="\T" labelOverlay=true color=purple]
node [shape=rect style=filled fillcolor=lightblue]
a1 -- b1
c1 -- d1 [labelOverlay="15%" label=high]
e1 -- f1 [label2node=true labelOverlay="75%" label=low]
g1:sw -- h1:nw
g1:s -- h1:n [labelOverlay="20%"]
g1:se -- h1:ne
j1 -- k1 [ label2node=true]
node[shape=square style=filled fillcolor=lightgreen]
{rank=sink
edge [fontcolor=red]
Aaa -- B3 [labelOverlay="33%"]
C98 -- D3 [labelOverlay="80%" label2node=true]
Eee -- F6 [label="adjust me" labelAdjust="45,-25"]
G12 -- H3 [label2node=true]
node [shape=plain fontcolor=blue style=""]
Lxx -- M123
Noo -- Ooo [label2node=true]
node [shape=oval fontcolor=blue style=""]
P -- Q
}
node[shape=circle style=filled fillcolor=pink]
edge [label2node=true label="aeiou" labelOverlay="78%"]
10 -- {11 12}
10 -- 13 [labelOverlay="38%"]
10 -- 14 [labelOverlay="62%"]
edge [label="three"]
node [shape=Mrecord]
13 -- 21
edge [labelOverlay="55%" label="T\nh\nr\ne\ne\n \n33"] 13 -- 22
edge [labelOverlay="60%"] 13 -- 23
}
Giving:
