trees
This is a graph someone send me in Word:
Ignoring the Hebrew text, how can I produce such a graph in LaTeX (I actually use LyX, but I suppose it won't help me so much)?
If there's an elegant and easy way to add the numbering as well, that will be great. Otherwise, I'll just add them in simple text.
I would do this in TikZ. Section 18.1 of the version 2.10 manual shows how to make trees. The nodes on the trees are a little nonstandard, but perhaps section 16.3 on multi-part nodes would be helpful.
Here's a quick mockup:
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes}
\begin{document}
\begin{center}
\begin{tikzpicture}
\tikzstyle{bplus}=[rectangle split, rectangle split horizontal,rectangle split ignore empty parts,draw]
\tikzstyle{every node}=[bplus]
\tikzstyle{level 1}=[sibling distance=60mm]
\tikzstyle{level 2}=[sibling distance=15mm]
\node {15} [->]
child {node {3 \nodepart{two} 7}
child {node {1 \nodepart{two} 2}}
child {node {4 \nodepart{two} 6}}
child {node {8 \nodepart{two} 9}}
}
child {node {21 \nodepart{two} 28 \nodepart{three} 32 \nodepart{four} 50}
child {node {17 \nodepart{two} 20}}
child {node {22 \nodepart{two} 25}}
child {node {28 \nodepart{two} 30}}
child[sibling distance=25mm] {node {34 \nodepart{two} 38 \nodepart{three} 44 \nodepart{four} 47}}
child[sibling distance=25mm] {node {53 \nodepart{two} 54 \nodepart{three} 60 \nodepart{four} 88}}
}
;\end{tikzpicture}
\end{center}
\end{document}
It's going to be more work to get the vertical lines doubled like in your example. The code for the rectangle split shape may need to be altered.
You can do this sort of tree easily with the tikz-qtree package:
In the code below, the labels are created using a tree with branches that are not actually drawn (using a style blank which sets [draw=none]). This ensures that they line up with the levels of the main tree. By putting two trees as nodes in a matrix we achieve a reasonable separation between the labels and the main tree.
\documentclass{article}
\usepackage{tikz-qtree}
\begin{document}
\tikzset{edge from parent/.style=
{draw, edge from parent path={(\tikzparentnode.south)
-- +(0,-8pt)
-| (\tikzchildnode)}},
blank/.style={draw=none}}
\begin{tikzpicture}
\matrix
{
\node{\Tree
[.Class \edge[blank];
[.Order \edge[blank];
[.Family \edge[blank];
[.Genus ]]]]};
&
\node{\Tree
[.{$\gamma$-proteobacteria}
[.Alteromonadales
[.Alteromonadaceae {Glaciecola} Alteromonas Agarivorans ] ]
[.Vibrionales [.Vibrionacae Vibrio ]]]};\\
};
\end{tikzpicture}
\end{document}
Best Answer
Here's a solution using TikZ (specifically
tikz-qtree):