how to make tree wider?

Question

This is a tree that I made by following code:

\begin{tikzpicture}[sibling distance=7em,
  every node/.style = {shape=rectangle, rounded corners,
    draw,
    top color=white, bottom color=blue!20}]]
  \node {$ C_{i} $}
    child { node {$ q_{1}k_{1} $} 
    child{node{$q_{2}k_{2} $}}
     child{node{$\cdots$}}
         child{node{$q_{2}k_{2}+(k_{2}-1) $}}}
    child { node {$ \cdots$} }
    child { node {$ q_{1}k_{1} +(k_{1}-1)$} 
    child{node{$q_{2}k_{2} $}}
     child{node{$\cdots$}}
         child{node{$q_{2}k_{2}+(k_{2}-1) $}}}
;
\end{tikzpicture}

As you can see two branch collapse and I wanna make the tree wider to make it nicer.

The simple answer is to use one of the dedicated tree drawing packages such as forest which pack nodes automatically for you. The base TikZ tree methods are quite weak in this respect in addition to having a very clumsy syntax. Plenty of examples on the site, and this question is certainly a duplicate of various questions. Here's one, with some good forest examples: Large Nodes in Tikz Tree Leads to Overlap — Alan Munn, Dec 23 '19 at 16:42
Other examples: Overlapping nodes in a red-black tree in TikZ and How to control spacing in a TikZ tree? the latter is a simpler example. — Alan Munn, Dec 23 '19 at 16:46

score 1 · Accepted Answer · answered Dec 23 '19 at 16:55

1

I agree with Alan Munn that you might want to switch to forest. Here are two variations that may illustrate some of its options.

\documentclass{article}
\usepackage[edges]{forest}

\begin{document}
\begin{forest}
for tree={shape=rectangle, rounded corners,calign=child,calign primary child=2,
    draw, top color=white, bottom color=blue!20,math content}
[C_{i}
 [q_{1}k_{1}
  [q_{2}k_{2}]
  [\cdots]
  [{q_{2}k_{2}+(k_{2}-1)}]
 ] 
 [\cdots[,phantom]]
 [{q_{2}k_{2}+(k_{2}-1)}
  [q_{2}k_{2}]
  [\cdots]
  [{q_{2}k_{2}+(k_{2}-1)}]
 ] 
]   
\end{forest}

or 

\tikzset{cbox/.style={shape=rectangle, rounded corners,
    draw, top color=white, bottom color=blue!20},
    none/.style={draw=none,shade=none},
    Dotted/.style={% https://tex.stackexchange.com/a/52856/194703
    dash pattern=on 0.1pt off 2mm,line cap=round,line width = 2pt,
    shorten <=2.5mm,shorten >=2.5mm}}
\begin{forest}
for tree={math content,calign=child,calign primary child=2,cbox}
[C_{i}
 [q_{1}k_{1},alias=left1
  [q_{2}k_{2},alias=left2]
  [,phantom]
  [{q_{2}k_{2}+(k_{2}-1)},alias=right2]
 ] 
 [,phantom[,phantom]]
 [{q_{2}k_{2}+(k_{2}-1)},alias=right1
  [{q_{2}k_{2}+(k_{2}-1)},alias=left3]
  [,phantom]
  [q_{2}k_{2},alias=right3]
 ] 
]   
\foreach \X in {1,2,3}  {\draw[Dotted](left\X.east) -- (right\X.west);}
\end{forest}
\end{document}

answered Dec 23 '19 at 16:55

Your second tree makes little sense, I think. The ellipses in the OPs example surely represent nodes with unspecified content rather than some connection between nodes. – Alan Munn Dec 23 '19 at 17:08
I used forest but now there is another problem. it doesn't fit in the paper – user9272398 Dec 23 '19 at 17:22
@user9272398 Could you please add the document class and its settings to your question such that one knows how much tree fits on a page. That is, please promote your example to a complete minimal document. – Dec 23 '19 at 17:33
please see https://tex.stackexchange.com/questions/521594/how-fit-a-big-tree-in-the-paper-and-change-the-place-of-some-nodes – user9272398 Dec 23 '19 at 17:39
@user9272398 I think that this question is hard to answer without the full code that produces the tree. – Dec 23 '19 at 18:09
please see edit – user9272398 Dec 23 '19 at 18:12

how to make tree wider?

1 Answers1