我有两个子浮点数的森林，如下所示：
\documentclass[prodmode,acmtecs]{acmsmall} % Aptara syntax
% Package to generate and customize Algorithm as per ACM style
\usepackage[ruled]{algorithm2e}
\usepackage{amsmath}
\usepackage{subfig}
\usepackage{bm}
\usepackage{rotating}
\usepackage{tablefootnote}
\usepackage{array}
\usepackage{multirow}
\usepackage{forest}
\usetikzlibrary{arrows.meta}
\renewcommand{\algorithmcfname}{ALGORITHM}
\SetAlFnt{\small}
\SetAlCapFnt{\small}
\SetAlCapNameFnt{\small}
\SetAlCapHSkip{0pt}
\IncMargin{-\parindent}
\include{definitions}
% DOI
\doi{0000001.0000001}
%ISSN
\issn{1234-56789}
% Document starts
\begin{document}
\forestset{
dir tree/.style={
for tree={
parent anchor=south west,
child anchor=west,
anchor=mid west,
inner ysep=-3pt,
grow'=0,
align=left,
edge path={
\noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) ++(1em,0) |- (.child anchor)\forestoption{edge label};
},
%font=\sffamily,
if n children=0{}{
delay={
prepend={[,phantom, calign with current]}
}
},
fit=rectangle,
before computing xy={
l=2em
}
},
}
}
\begin{figure}[h!]
\centering
\subfloat{
\label{fig:contribution_left}
\begin{forest}
dir tree
[\textbf{Paper Organization}
[\textbf{\pmb{\S} \ref{sec:promises and challenges} Promises and challenges}
[optimization benefits]
[Optimization space
[The selection]
[The phase-ordering]
]
]
[\textbf{\pmb{\S} \ref{sec:characterization techniques} Characterization}
[Hybrid]
[Dimension Reduction Techniques
[Principal Component Analysis]
]
]
]
\end{forest}}
\subfloat{
\label{fig:contribution_right}
\begin{forest}
dir tree
[
[\textbf{\pmb{\S} \ref{sec:predication_classes} Prediction Classifications}
[Feature predictors]
]
[\textbf{\pmb{\S} \ref{sec:DSE} Design Space Exploration}
[Compilation]
]
[\textbf{\pmb{\S} \ref{sec:Target Domain} Target Domain}
[Target architecture
[Embedded systems]
[Workstations & HPC domain]
]
[Target Compiler
[GCC]
]
]
[\textbf{\pmb{\S} \ref{sec:Evaluations} Evaluations}
[Performance comparisons]
]
% [\textbf{\pmb{\S} \ref{sec:conclusion} Conclusion and future challenges}]
]
\end{forest}}
\caption{Organization of the paper in different sections}
\end{figure}
\end{document}
我在哪里错过了标签、额外的列等等，导致出现此错误：
extra alignment tab has been changed to cr
答案1
array在“与”符号之外，tabular以及在需要排版“与”符号的情况下，在这些环境内，“与”符号前面必须加上反斜杠。
\documentclass{article}
\usepackage{forest}
\usepackage{subfig}
\usepackage{amsmath}
\forestset{
dir tree/.style={
for tree={
parent anchor=south west,
child anchor=west,
anchor=mid west,
inner ysep=-3pt,
grow'=0,
align=left,
edge path={
\noexpand\path [draw, \forestoption{edge}] (!u.parent anchor) ++(1em,0) |- (.child anchor)\forestoption{edge label};
},
%font=\sffamily,
if n children=0{}{
delay={
prepend={[,phantom, calign with current]}
}
},
fit=rectangle,
before computing xy={
l=2em
}
},
}
}
\begin{document}
\begin{figure}[h!]
\centering
\subfloat{%
% \label{fig:contribution_left}% no point in using a label here
\begin{forest}
dir tree
[\textbf{Paper Organization}
[\textbf{\pmb{\S} \ref{sec:promises and challenges} Promises and challenges}
[optimization benefits]
[Optimization space
[The selection]
[The phase-ordering]
]
]
[\textbf{\pmb{\S} \ref{sec:characterization techniques} Characterization}
[Hybrid]
[Dimension Reduction Techniques
[Principal Component Analysis]
]
]
]
\end{forest}
}
\subfloat{%
\begin{forest}
dir tree
[
[\textbf{\pmb{\S} \ref{sec:predication_classes} Prediction Classifications}
[Feature predictors]
]
[\textbf{\pmb{\S} \ref{sec:DSE} Design Space Exploration}
[Compilation]
]
[\textbf{\pmb{\S} \ref{sec:Target Domain} Target Domain}
[Target architecture
[Embedded systems]
[Workstations \& HPC domain]
]
[Target Compiler
[GCC]
]
]
[\textbf{\pmb{\S} \ref{sec:Evaluations} Evaluations}
[Performance comparisons]
]
% % [\textbf{\pmb{\S} \ref{sec:conclusion} Conclusion and future challenges}]
]
\end{forest}
}
\caption{Organization of the paper in different sections}\label{fig:contributions}% label needs to follow caption
\end{figure}
\end{document}
请注意，当前的 Forest 提供了绘制此类树的内置方法，dir tree不再需要或可能会显著简化。
下面的示例dir tree使用新库更新为一个非常简单的定义，并演示了如何将树分成两列，因为我知道这也许是您真正想用子浮点数做的事情。
我们不需要分割树，而只需将其一部分移动到另一个位置并edge path在必要时进行修改。
\documentclass{article}
\usepackage[edges]{forest}
\usepackage{amsmath}
\forestset{%
dir tree/.style={%
for tree={%
folder,
grow'=0,
s sep'-=5pt,
},
where={level()<2}{font=\bfseries}{},
},
}
\begin{document}
\begin{figure}% never use h as the sole specifier
\centering
\begin{forest}
dir tree
[Paper Organization
[\pmb{\S} \ref{sec:promises and challenges} Promises and challenges
[optimization benefits]
[Optimization space
[The selection]
[The phase-ordering]
]
]
[\pmb{\S} \ref{sec:characterization techniques} Characterization
[Hybrid]
[Dimension Reduction Techniques
[Principal Component Analysis]
]
]
[\pmb{\S} \ref{sec:predication_classes} Prediction Classifications,
before drawing tree={%
tempdima/.max={(x)+(max_x)}{r,tree},
tempdimb={y("!r1")-y()},
for current and following nodes={%
x+/.register=tempdima,
y+/.register=tempdimb,
},
for current and following siblings={%
edge path'={%
(!r.parent anchor) +({\forestregister{tempdima}+\forestregister{folder indent}},0) |- (.child anchor)
},
},
}
[Feature predictors]
]
[\pmb{\S} \ref{sec:DSE} Design Space Exploration
[Compilation]
]
[\pmb{\S} \ref{sec:Target Domain} Target Domain
[Target architecture
[Embedded systems]
[Workstations \& HPC domain]
]
[Target Compiler
[GCC]
]
]
[\textbf{\pmb{\S} \ref{sec:Evaluations} Evaluations}
[Performance comparisons]
]
]
\end{forest}
\caption{Organization of the paper in different sections}\label{fig:contributions}% label needs to follow caption
\end{figure}
\end{document}
