Table Of Contents
My computer science final project was about building a dependency parser for Spanish. Writing the documentation I had to draw some trees representing a dependency graph and a visual explanation of what an SVM (Support Vector Machine ) is.
To draw all this pictures I’ve used Tikz, a LaTeX package. Here is the code:
Drawing a dependency tree with Tikz
Example 1
Here is the code:
\documentclass{standalone}
\usepackage{tikz}
\usepackage{tikz-dependency}
\begin{document}
\begin{dependency}[edge slant=15pt,label theme = simple, edge theme = iron]
\begin{deptext}[column sep=1em]
This \& time \& around \& , \& they \& 're \& moving \& even \& faster \&
. \\
\end{deptext}
\deproot{7}{ROOT}
\depedge{2}{1}{DET}
\depedge[edge height=1.9cm]{7}{2}{TMOD}
\depedge{2}{3}{ADVMOD}
\depedge{7}{6}{AUX}
\depedge{7}{5}{NSUBJ}
\depedge{7}{4}{PUNCT}
\depedge{7}{10}{PUNCT}
\depedge{7}{9}{ADVMOD}
\depedge[edge start x offset=-4pt]{9}{8}{ADVMOD}
\end{dependency}
\end{document}
And the result:
Example 2
\documentclass{standalone}
\usepackage{tikz}
\usepackage{tikz-qtree,tikz-qtree-compat}
\begin{document}
\tiny
\begin{tikzpicture}[every node/.style={align=center},scale=.9]
\tikzset{
edge from parent/.style={
draw,edge from parent
path={(\tikzparentnode.south)-- +(0,-8pt)-| (\tikzchildnode)}
},
frontier/.style={distance from root=208pt}, % Align leaf nodes
level 1+/.style={level distance=18pt} % Distance between levels
}
\Tree [.S
[.NP Rolls-Royce\\NNP Motor\\NNP Cars\\NNPS Inc\\NNP ]
[.VP said\\VBD
[.SBAR [.none ]
[.S
[.NP it\\PRP ]
[. VP expects\\VBZ
[.S
[.NP its\\PRP\$ U.S\\NNP sales\\NNS ]
[.VP to\\TO
[.VP remain\\VB
[.ADJP steady\\JJ ]
[.PP at\\IN
[.NP
[.QP about\\IN 1200\\CD ]
cars\\NNS
]
]
]
]
]
]
]
]
]
]
\end{tikzpicture}
\end{document}
Result:
Example 3
Finally, one last example:
\documentclass{standalone}
\usepackage{tikz}
\usepackage{tikz-qtree,tikz-qtree-compat}
\begin{document}
\begin{tikzpicture}[every node/.style={align=center},level distance=30pt]
\tikzset{edge from parent/.append style={<-, >=latex,thick}}
\Tree [.said\\VBD
[.Inc.\\NNP Rolls-Royce\\NNP Motor\\NNP Cars\\NNPS ]
[.expects\\VBZ it\\PRP
[.remain\\VB
[.sales\\NNS its\\PRP\$ U.S\\NNP ]
to\\TO
steady\\JJ
[.at\\IN [.cars\\NNS [.about\\IN 1200\\CD ] ] ]
]
]
]
\end{tikzpicture}
\end{document}
Drawing a Support Vector Machine In tikz
I’ve also had to draw a visual explanation of what a SVM is:
\documentclass{standalone}
\usepackage{tikz}
\usepackage{tikz-qtree,tikz-qtree-compat}
\usetikzlibrary{calc}
\begin{document}
\tikzset{
leftNode/.style={circle,minimum width=.5ex, fill=none,draw},
rightNode/.style={circle,minimum width=.5ex, fill=black,thick,draw},
rightNodeInLine/.style={solid,circle,minimum width=.7ex, fill=black,thick,draw=white},
leftNodeInLine/.style={solid,circle,minimum width=.7ex, fill=none,thick,draw},
}
\begin{tikzpicture}[
scale=2,
important line/.style={thick}, dashed line/.style={dashed, thin},
every node/.style={color=black},
]
\draw[dashed line, yshift=.7cm]
(.2,.2) coordinate (sls) -- (2.5,2.5) coordinate (sle)
node[solid,circle,minimum width=2.8ex,fill=none,thick,draw] (name) at (2,2){}
node[leftNodeInLine] (name) at (2,2){}
node[solid,circle,minimum width=2.8ex,fill=none,thick,draw] (name) at (1.5,1.5){}
node[leftNodeInLine] (name) at (1.5,1.5){}
node [above right] {$w\cdot x + b > 1$};
\draw[important line]
(.7,.7) coordinate (lines) -- (3,3) coordinate (linee)
node [above right] {$w\cdot x + b = 0$};
\draw[dashed line, xshift=.7cm]
(.2,.2) coordinate (ils) -- (2.5,2.5) coordinate (ile)
node[solid,circle,minimum width=2.8ex,fill=none,thick,draw] (name) at (1.8,1.8){}
node[rightNodeInLine] (name) at (1.8,1.8){}
node [above right] {$w\cdot x + b < -1$};
\draw[very thick,<->] ($(sls)+(.2,.2)$) -- ($(ils)+(.2,.2)$)
node[sloped,above, near end] {Margen};
\foreach \Point in {(.9,2.4), (1.3,2.5), (1.3,2.1), (2,3), (1,2.9)}{
\draw \Point node[leftNode]{};
}
\foreach \Point in {(2.9,1.4), (2.3,.5), (3.3,.1), (2,0.9), (2.5,1)}{
\draw \Point node[rightNode]{};
}
\end{tikzpicture}
\end{document}
References
While writing this snippets, I had to ask some questions on tex.stackexchange.com, those questions can be found in the following links:
- Align all leaf nodes in tikz-qtree | tex.stackexchange.com
- Align independent tikzpictures | tex.stackexchange.com
Spot a typo?: Help me fix it by contacting me or commenting below!