# Decision Tree with Tikz - Not to fill and grow down instead of growing west

I am trying to build this decision tree I was take out fill option at

\tikzstyle{choice} = [circle, minimum width=8pt, fill, inner sep=0pt]


and also make the tree grow down

\tikzstyle{level 1}=[level distance=1.5cm, sibling distance=2.5cm]
\tikzstyle{level 2}=[level distance=1cm, sibling distance=2cm]
\tikzstyle{level 3}=[level distance=1cm, sibling distance=1.5cm]
\tikzstyle{bag} = [circle, text width=4em, text centered, draw]
\tikzstyle{decision} = [rectangle, minimum height=8pt, minimum width=8pt, fill, inner sep=0pt]
\tikzstyle{choice} = [circle, minimum width=8pt, fill, inner sep=0pt]
\tikzstyle{end} = [circle, text width=1em, text centered, draw, inner sep=0pt]

\begin{tikzpicture}[grow=right, child anchor=west]
\tiny
\node[bag]{XOR}
child {
node[decision]{TEST}
child {
node[bag]{A= 0}
child{
node[choice]{}
child {
node[bag]{B=0}
child {
node[end]{0}
}
}
child {
node[bag]{B=1}
child {
node[end]{1}
}
}
}
}
child {
node[bag]{A=1}
child{
node[choice]{}
child {
node[bag]{B=0}
child {
node[end]{1}
}
}
child {
node[bag]{B=1}
child {
node[end]{0}
}
}
}
}
};

\end{tikzpicture}

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Welcome to TeX.sx! Please add a minimal working example (MWE) that illustrates your problem. With a few more lines you can make this example fully compilable by copy/pasting :) – percusse Oct 3 '12 at 12:52
I don't quite understand what you are asking. The default behaviour is for the tree to grow down. You can make it grow "west" instead with the grow=left option. – Seamus Oct 3 '12 at 13:05
My tree grows side ways i want to grow it downwards natural progression, i am very new to latex – find-missing-semicolon Oct 3 '12 at 13:13

## 1 Answer

If you don't give any options, the tree grows downwards, naturally. I have changed

\tikzstyle{decision} = [rectangle, minimum height=8pt, minimum width=8pt, fill, inner sep=0pt]


to

\tikzstyle{choice} = [circle, minimum width=8pt, draw, inner sep=0pt]


to remove the fill. Also you have to use appropriate distances in

\tikzstyle{level 2}=[level distance=1cm, sibling distance=5cm]


so that things don't overlap.

Your code becomes

\documentclass{article}
\usepackage{tikz}
\begin{document}
\tikzstyle{level 1}=[level distance=1.5cm, sibling distance=2.5cm]
\tikzstyle{level 2}=[level distance=1cm, sibling distance=5cm]
\tikzstyle{level 3}=[level distance=1cm, sibling distance=2cm]
\tikzstyle{bag} = [circle, text width=4em, text centered, draw]
\tikzstyle{decision} = [rectangle, minimum height=8pt, minimum width=8pt, fill, inner sep=0pt]
\tikzstyle{choice} = [circle, minimum width=8pt, draw, inner sep=0pt]
\tikzstyle{end} = [circle, text width=1em, text centered, draw, inner sep=0pt]

\begin{tikzpicture}%%[grow=left, child anchor=east]
\tiny
\node[bag]{XOR}
child {
node[decision]{TEST}
child {
node[bag]{A= 0}
child{
node[choice]{}
child {
node[bag]{B=0}
child {
node[end]{0}
}
}
child {
node[bag]{B=1}
child {
node[end]{1}
}
}
}
}
child {
node[bag]{A=1}
child{
node[choice]{}
child {
node[bag]{B=0}
child {
node[end]{1}
}
}
child {
node[bag]{B=1}
child {
node[end]{0}
}
}
}
}
};

\end{tikzpicture}
\end{document}


Hope that helps!

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