Graphviz Array LR but stacked TB - graphviz

Question

digraph G
{
rankdir=LR;
Array1 [ shape = record, label = "{ <a1>A(1) | <a2>A(2) | <a3>A(...) | <an>A(n)}"] ;
Array2 [ shape = record, label = "{ <b1>B(1) | <b2>B(2) | <b3>B(...) | <bn1>B(n+1)}"] ;
Array1:a1 -> Array2:b1 [style=solid];
Array1:an -> Array2:bn1 [style=solid];
{rank=same; Array1; Array2;}
}
I'm trying to get graphviz plot two array from left to right but Array1 on the top and Array2 at the bottom.
Output with rank=same
As you can see in the picture there are no arrows drawn but the layout is like it should be. I'm also getting some errors from dot, but I can't find anything useful with that information:
dot -Tpng algoA.dot -o algoA.png :(
Warning: flat edge between adjacent nodes one of which has a record shape - replace records with HTML-like labels
Edge Array2 -> Array1
Error: lost Array1 Array2 edge
Error: lost Array1 Array2 edge
digraph G
{
rankdir=LR;
Array1 [ shape = record, label = "{ <a1>A(1) | <a2>A(2) | <a3>A(...) | <an>A(n)}"] ;
Array2 [ shape = record, label = "{ <b1>B(1) | <b2>B(2) | <b3>B(...) | <bn1>B(n+1)}"] ;
Array1:a1 -> Array2:b1 [style=solid];
Array1:an -> Array2:bn1 [style=solid];
//{rank=same; Array1; Array2;}
}
Output with rank=same removed
Without rank=same in the code I get the arrows like I wanted, but not like I wanted it with Array1 on top and Array2 on the bottom. The error messages are gone. What am I doing wrong? I tried several ways and all of them didn't work for me, I'm always getting a wrong layout or I have to add several other nodes to get it drawn, with those invisible the arrows for my arrays also don't get drawn.

Answer 1

The key is in the error message: replace records with HTML-like labels. Details can be found here.
Taking your code and what I understand you want to achieve, this can be done with creating your arrays as two HTML-like labels. Comments in the code.
digraph so
{
# plaintext is being used to create HTML-like labels
node [shape=plaintext]
# no border for the table, a single border for each cell and
# no distance between individual cells looks like record shape
# PORTs being defined as addresses of individual cells
# that edges can be directed to
array1 [label=<
<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0"> <TR>
<TD PORT="a1">A(1)</TD>
<TD PORT="a2">A(2)</TD>
<TD PORT="ax">A(...)</TD>
<TD PORT="an">A(n)</TD>
</TR> </TABLE>>];
array2 [label=<
<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0"> <TR>
<TD PORT="b1">B(1)</TD>
<TD PORT="b2">B(2)</TD>
<TD PORT="bx">B(...)</TD>
<TD PORT="bn">B(n+1)</TD>
</TR> </TABLE>>];
array1:a1 -> array2:b1;
array1:an -> array2:bn;
}
This produces what (I think) you want: