Rank between source and sink

Help
1

Problem

Is there a rank in-between source and sink?

It’d be nice to take nominal values (e.g., rank=1, rank=2,
rank=3).

MWE

Have

digraph subset {
  // rankdir="LR"
  node [label="", shape="square"]
  edge [style="invis"]


  subgraph fullset {
    rank="source"

    fs0 [label="0"]
    fs1 [label="1"]
    fs2 [label="2"]
    fs3 [label="3"]
    fs4 [label="4"]
    fs5 [label="5"]
    fs6 [label="6"]
    fs7 [label="7"]

    fs0 -> fs1 -> fs2 -> fs3 -> fs4 -> fs5 -> fs6 -> fs7
  }

  subgraph rn {
    rank="sink"
    node [shape="none"]

    r0 [label="1"]
    r1 [label="0"]
    r2 [label="0"]
    r3 [label="1"]
    r4 [label="0"]
    r5 [label="1"]
    r6 [label="1"]
    r7 [label="0"]

    r0 -> r1 -> r2 -> r3 -> r4 -> r5 -> r6 -> r7
  }

  subgraph subset {
    rank="min"

    s0 [label="0"]
    s3 [label="3"]
    s5 [label="5"]
    s6 [label="6"]

    node [style="invis"]
    s1
    s2
    s4
    s7

    s0 -> s1 -> s2 -> s3 -> s4 -> s5 -> s6 -> s7
  }
}

Want

fullset up top, rn in middle, subset on bottom (in order that they
appear).

Produced the opposite by removing ranks and specifying rankdir:

opposite digraph
opposite digraph923×203 3.47 KB

Edit here.

2

For the general case, no (see Allow user to provide levels, or levels plus ordering (no ranking or crossing minimization), and let dot finish (#2023) · Issues · graphviz / graphviz · GitLab).
But for a 3rd / middle rank, yes (rank | Graphviz):
rank=source // exclusive
rank=same // all the rest
rank=sink // exclusive

3

Thank you, I hadn’t gotten a notification for your reply.

same actually does the trick!

Glad to see the idea of levels is being considered.

The problem remaining is that node [shape="none"] changes the size (as you pointed out in my other post) and node [style="invis"] also makes the label invisible.

Check it out.

4

Ou! I think I got it with width.

I set square and none to 0.5. I believe that’s what square is anyway, but hard-coded it for my sanity.

Ah, now it’s pretty spaced out though:
image

I want to decrease the vertical spacing. I tried ranksep=0.5 at the top of the digraph but to no avail.

5

That’s cause 0.5 is the default.

0.1 did it.

Here is the final working solution:

digraph subset {
  ranksep=0.1
  node [shape="square", width=0.5, label=""]
  node [shape="square", label=""]
  edge [style="invis"]

  subgraph fullset {
    rank="source"

    fs0 [label="0"]
    fs1 [label="1"]
    fs2 [label="2"]
    fs3 [label="3"]
    fs4 [label="4"]
    fs5 [label="5"]
    fs6 [label="6"]
    fs7 [label="7"]

    fs0 -> fs1 -> fs2 -> fs3 -> fs4 -> fs5 -> fs6 -> fs7
  }

  subgraph rn {
    rank="same"
    node [shape="none", width=0.5]

    r0 [label="1"]
    r1 [label="0"]
    r2 [label="0"]
    r3 [label="1"]
    r4 [label="0"]
    r5 [label="1"]
    r6 [label="1"]
    r7 [label="0"]

    r0 -> r1 -> r2 -> r3 -> r4 -> r5 -> r6 -> r7
  }

  subgraph subset {
    rank="sink"

    s0 [label="0"]
    s3 [label="3"]
    s5 [label="5"]
    s6 [label="6"]

    node [style="invis"]
    s1
    s2
    s4
    s7

    s0 -> s1 -> s2 -> s3 -> s4 -> s5 -> s6 -> s7
  }
}

final solution

Marking this as solution for completeness, but wouldn’t have arrived at this solution without @steveroush’s help.