Hi,
I am developing an R package to generate a DOT plot based on user input. The text might have different length or the number of nodes in parallel will be different. I have managed to calculate the minlen for some cases. I calculated the width of the text in each node and multiplied by some values. This method works if there are only a few nodes in parallel or the text is not too wide, but it fails when the text in the node is too long or there are too many nodes in parallel. The Graphviz scaled down the figure to fit the window but the minlen is calculated without scaling. So I have wide distance between nodes. I can manually decrease the minlen and get it working, but I am trying to find a solution, where the minlen is calculated based accounting for the scaling.
[dot verbose=true]
digraph consort_diagram {
graph [layout = dot, splines=ortho, overlap=prism]
node definitions with substituted label text
node [shape = rectangle, fillcolor = Biege, style=“”, fillcolor = “”, color = “”]
node1 [label = “Cohort 1 (n=6)”]
node2 [label = “Cohort 2 (n=6)”]
node3 [label = “Cohort 3 (n=6)”]
node4 [label = “Excluded (n=1)\l”]
node5 [label = “Excluded (n=3)\l”]
node7 [label = “Cohort 1 (n=5)”]
node8 [label = “Cohort 2 (n=3)”]
node10 [label = “Total (n=14)”]
Invisible point node for joints
node [shape = point, width = 0, style=invis]
P1 P2 P3 P4 P5
subgraph {
rank = same; rankdir = LR; node1; node2; node3;
}
subgraph {
rank = same; rankdir = LR; P1; node4;
}
subgraph {
rank = same; rankdir = LR; node7; node8; node9;
}
subgraph {
rank = same; rankdir = LR; node4; node5; node6;
}
subgraph {
rank = same; rankdir = LR; P2; node5;
}
subgraph {
rank = same; rankdir = LR; node4; node5;
}
subgraph {
rank = same; rankdir = LR; P3; P4; P5;
}
edge[style=“”];
node1 → P1 [arrowhead = none];
P1 → node4;
P1 → node7;
node2 → P2 [arrowhead = none];
P2 → node5;
P2 → node8;
P4 → node10;
node7 → P3 [arrowhead = none];
node8 → P4 [arrowhead = none];
node9 → P5 [arrowhead = none];
P3 → P4 → P5 [arrowhead = none, minlen = 7.0];
node3 → node9 [arrowhead = none];
}
[/dot]
But the distance between nodes are increased in the example below:
[dot verbose=true]
digraph consort_diagram {
graph [layout = dot, splines=ortho, overlap=prism]
node definitions with substituted label text
node [shape = rectangle, fillcolor = Biege, style=“”, fillcolor = “”, color = “”]
node1 [label = “Cohort 1 (n=6)”]
node2 [label = “Cohort 2 (n=6)”]
node3 [label = “Cohort 3 (n=6)”]
node4 [label = “Cohort 4 (n=6)”]
node5 [label = “Cohort 5 (n=6)”]
node6 [label = “Excluded (n=1)\l”]
node7 [label = “Excluded (n=3)\lPatient died before surgery\l”]
node9 [label = “Excluded (n=3)\l”]
node10 [label = “Excluded (n=3)\lPatient declined to participate\l”]
node11 [label = “Cohort 1 (n=5)”]
node12 [label = “Cohort 2 (n=3)”]
node14 [label = “Cohort 5 (n=6)”]
node15 [label = “Cohort 5 (n=6)”]
node16 [label = “Total (n=14)”]
Invisible point node for joints
node [shape = point, width = 0, style=invis]
P1 P2 P3 P4 P5 P6 P7 P8 P9
subgraph {
rank = same; rankdir = LR; node1; node2; node3; node4; node5;
}
subgraph {
rank = same; rankdir = LR; P1; node6;
}
subgraph {
rank = same; rankdir = LR; node11; node12; node13; node14; node15;
}
subgraph {
rank = same; rankdir = LR; node6; node7; node8; node9; node10;
}
subgraph {
rank = same; rankdir = LR; P2; node7;
}
subgraph {
rank = same; rankdir = LR; node6; node7; node9; node10;
}
subgraph {
rank = same; rankdir = LR; P3; node9;
}
subgraph {
rank = same; rankdir = LR; P4; node10;
}
subgraph {
rank = same; rankdir = LR; P5; P6; P7; P8; P9;
}
edge[style=“”];
node1 → P1 [arrowhead = none];
P1 → node6;
P1 → node11;
node2 → P2 [arrowhead = none];
P2 → node7;
P2 → node12;
node4 → P3 [arrowhead = none];
P3 → node9;
P3 → node14;
node5 → P4 [arrowhead = none];
P4 → node10;
P4 → node15;
P7 → node16;
node11 → P5 [arrowhead = none];
node12 → P6 [arrowhead = none];
node13 → P7 [arrowhead = none];
node14 → P8 [arrowhead = none];
node15 → P9 [arrowhead = none];
P5 → P6 → P7 → P8 → P9 [arrowhead = none, minlen = 16.0];
node3 → node13 [arrowhead = none];
}
[/dot]
I don’t want the nodes to have large space but want to keep the layout as it is.
So my question is: how to account for potential scaling when calculating the minlen based on the text width within the nodes? Or is there a way to draw a plot without specifying the minlen but keep the layout as in the example?
Much appreciate any help.
