I want to draw the following picture. I learn how to draw it from Decision Tree with Labels on Both Sides of Line and get a partial solution.
I can't do the following things:
- How to make the starting point of the line and the first node of the decision tree on the same vertical line?
- How to make the second point of the line and the third node of the decision tree are also on the same vertical line?
- How to draw those edge labels (Test, No test...)?
- How to draw the node label (Test results revealed)?
- How to draw the vertical line at the end of the branch?
\documentclass{beamer}
\usepackage{forest}
\tikzset{
decision/.style={rectangle, minimum height=3pt, minimum width=3pt, draw=black, fill=black, thick, inner sep=0pt},
chance/.style={circle, minimum width=3pt, draw=black, fill=black, thick, inner sep=0pt}
}
\forestset{
declare toks={optimality}{},
declare toks={edge label below}{},
}
\begin{document}
\begin{frame}[fragile]
\begin{tikzpicture}[xscale=8.5]
\draw[-] (0,0) -- (1,0);
\draw (0,0) node[below,align=center] {\scriptsize Development \\[-2mm] \scriptsize and test} node[above=0.2cm] {\scriptsize Now} -- (0,0.2);
\draw (0.65,0) node[below,align=center]{\scriptsize Initial investment \\[-2mm]\scriptsize -\$1,500} node[above=0.2cm] {\scriptsize Year 1} -- (0.65,0.2);
\end{tikzpicture}
\scalebox{0.85}{%
\begin{forest}
my label/.style={
edge label={node[midway,above,font=\scriptsize,align=center]{#1}}
},
my below/.style={
edge label below={node[midway,below,font=\scriptsize,align=center]{#1}}
},
for tree={
grow=0,
child anchor=west,
anchor=west,
text ragged,
inner sep=1mm,
edge={draw=black},
l sep+=30mm,
s sep+=5mm,
edge path={
\noexpand\path[\forestoption{edge}]
(!u.parent anchor) -- ([xshift=-22.5mm].child anchor)\forestove{optimality}
-- (.child anchor)\forestoption{edge label below}\forestoption{edge label};
},
}
[,decision
[]
[,label={\scriptsize Test results revealed}, chance
[,decision,my label=Success, my below=(75\% probability)
[,my label={NPV$=$0}
]
[,my label={NPV$=$-\$3,611}
]
]
[,decision,my label=Failure, my below=(25\% probability)
[,my label={NPV$=$0}
]
[,my label={NPV$=$\$1,517}
]
]
]
]
\end{forest}%
}%
\scriptsize
Squares represent decision points. Circle represents receipt of information.
SEC must make two decisions:
~~1. Whether to develop and test the engine.
~~2. Whether to invest for full-scale production.
With decision trees, decisions are made in reverse order.
\end{frame}
\end{document}