I'm using algorithm2e package. One of my algorithm does NOT need a title.
If I simply do not type in \caption, there are still three rules.!
I want to remove the second rule.
Is there any way to do this? Thanks!
[Tex/LaTex] Remove the rule below the algorithm title – using Algorithm2e
algorithm2ecaptions
Related Solutions
Based on @lockstep answer, I've created a wrapper environment which allows the minipage width to be specified as an argument.
%adds minipage to inside of algorithms
\newlength{\tightalgowidth}
\newlength{\tightalgoremainder}
% uncomment to use centered floating algorithms
\newenvironment{tightalgo}[2][]
{
\setlength{\tightalgowidth}{#2}
\setlength{\tightalgoremainder}{\linewidth-\tightalgowidth}
\begin{algorithm}[#1] }
{ \end{algorithm} }
\makeatletter
\patchcmd{\@algocf@start}{%
\begin{lrbox}{\algocf@algobox}%
}{%
\rule{0.5\tightalgoremainder}{\z@}%
\begin{lrbox}{\algocf@algobox}%
\begin{minipage}{\tightalgowidth}%
}{}{}
\patchcmd{\@algocf@finish}{%
\end{lrbox}%
}{%
\end{minipage}%
\end{lrbox}%
}{}{}
\makeatother
Use it like this
\begin{tightalgo}[ht]{0.5\linewidth}
\caption{NaiveSelect}\label{algo:naive-option}
Some alg step \;
Some other \;
\end{tightalgo}
For this result
If you're willing to use \TitleOfAlgo instead (which, for algorithms, is more flexible than \caption in many ways), then see John Wickerson's answer.
Otherwise, if you really want to use \caption but remove algorithm numbering, simply insert \renewcommand{\thealgocf}{} in your preamble.
\documentclass[10pt]{report}
\usepackage{algorithm2e}
\renewcommand{\thealgocf}{}
\begin{document}
\begin{algorithm}[H]
\SetAlgoLined
\KwData{this text}
\KwResult{how to write algorithm with \LaTeX2e }
initialization\;
\While{not at end of this document}{
read current\;
\eIf{understand}{
go to next section\;
current section becomes this one\;
}{
go back to the beginning of current section\;
}
}
\caption{How to write algorithms}
\end{algorithm}
\end{document}
Best Answer
One could probably detect whether the caption is empty. However, a quick/dirty way is to merely condense the gap (so that the two horizontal rules are drawn overtop of one another). Below two possibilities are presented: