[Tex/LaTex] Add lines to the bottom and top of algorithm

algorithms

I am trying to write some psuedocode for my algorithm. Is it possible to add lines to the button and the top of the algorithm? If yes how?

Code:

\documentclass{article}
\usepackage[]{algorithm2e}
\begin{document}
\begin{algorithm}[H]
\SetAlgoLined
\KwData{$next\_id, speed,stop\_distance, mac$}
\KwResult{Find the initializer. }
 int $next\_id1$ = find a  record with $speed > 30$ for this $mac$;\\
 int $next\_id2$ = find record with $speed <7$ and $stop\_distance < 60$ for this mac;\\
 \If{$next\_id1 < next\_id2$}{
   find the related $stop\_name$ for this mac;
   return  $stop\_name$;
 }
\caption{Algorithm to find intializer.}
\end{algorithm}
\end{document}

Best Answer

You can use ruled option to the package algorithm2e.

\documentclass{article}
\usepackage[ruled]{algorithm2e}
\begin{document}
\begin{algorithm}[H]
\SetAlgoLined
\KwData{$next\_id, speed,stop\_distance, mac$}
\KwResult{Find the initializer. }
 int $next\_id1$ = find a  record with $speed > 30$ for this $mac$;\\
 int $next\_id2$ = find record with $speed <7$ and $stop\_distance < 60$ for this mac;\\
 \If{$next\_id1 < next\_id2$}{
   find the related $stop\_name$ for this mac;
   return  $stop\_name$;
 }
\caption{Algorithm to find intializer.}
\end{algorithm}
\end{document}

There are other options as seen in this screen shot from the manual:

Related Solutions

[Tex/LaTex] How to add unnumbered lines in an algorithm

By virtue of the fact that you are using algpseudocode, it looks like you are actually using the algorithmicx package. From page 4 of its manual, it looks like you want the \Statex command.

If for some reason that doesn't work, a solution can be nastily hacked by forcing suppression of the line number:

\def\NoNumber#1{{\def\alglinenumber##1{}\State #1}\addtocounter{ALG@line}{-1}}

You can then use \NoNumber like \State:

\begin{algorithm}
\caption{A title.} 
\begin{algorithmic}[1] 
\State Step 1.
\State Step 2. 
\NoNumber{This line will not have a number!}
\State Step 3.
\end{algorithmic}
\end{algorithm}

[Tex/LaTex] algorithm2e and \algomargin with negative value

Here's one possible solution:

\documentclass{article}
\usepackage[ruled,vlined,algosection]{algorithm2e}

\newlength\marincrease

\makeatletter
\newenvironment{Walgo}[2][htbp]
  {\renewcommand{\@algocf@start}{%
    \setlength\marincrease{#2}
  \@algoskip%
  \begin{lrbox}{\algocf@algobox}%
  \begin{minipage}{\dimexpr\textwidth+2\marincrease\relax}
  \setlength{\algowidth}{\hsize}%
  \vbox\bgroup% save all the algo in a box
  \hbox to\algowidth\bgroup\hbox to \algomargin{\hfill}\vtop\bgroup%
  \ifthenelse{\boolean{algocf@slide}}{\parskip 0.5ex\color{black}}{}%
  % initialization
  \addtolength{\hsize}{-1.5\algomargin}%
  \let\@mathsemicolon=\;\def\;{\ifmmode\@mathsemicolon\else\@endalgoln\fi}%
  \raggedright\AlFnt{}%
  \ifthenelse{\boolean{algocf@slide}}{\IncMargin{\skipalgocfslide}}{}%
  \@algoinsideskip%
%   \let\@emathdisplay=\]\def\]{\algocf@endline\@emathdisplay\nl}%
  }%
\renewcommand{\@algocf@finish}{%
  \@algoinsideskip%
  \egroup%end of vtop which contain all the text
  \hfill\egroup%end of hbox wich contains [margin][vtop]
  \ifthenelse{\boolean{algocf@slide}}{\DecMargin{\skipalgocfslide}}{}%
  %
  \egroup%end of main vbox
  \end{minipage}
  \end{lrbox}%
  \makebox[\linewidth][c]{\algocf@makethealgo}% print the algo
  \@algoskip%
  % restore dimension and macros
  \setlength{\hsize}{\algowidth}%
  \lineskip\normallineskip\setlength{\skiptotal}{\@defaultskiptotal}%
  \let\;=\@mathsemicolon%  
  \let\]=\@emathdisplay%
}%
  \begin{algorithm}[#1]}
  {\end{algorithm}}
\makeatother

\begin{document}
\section{Test Section}

\begin{Walgo}[ht]{20pt} 
\While{not at end of this document}
{
  read current\;
  \eIf{understand}
  {current section becomes this one\;}
  {go back to the beginning of current section and add osme more text to see the change in the margins\;}
}
\caption{How to write algorithms and some more text to see the effect of the change in the margins}
\end{Walgo}

\begin{algorithm}[ht] 
\While{not at end of this document}
{
  read current\;
  \eIf{understand}
  {current section becomes this one\;}
  {go back to the beginning of current section and add osme more text to see the change in the margins\;}
}
\caption{How to write algorithms and some more text to see the effect of the change in the margins}
\end{algorithm}

\begin{Walgo}[!ht]{2cm}
\While{not at end of this document}
{
  read current\;
  \eIf{understand}
  {current section becomes this one\;}
  {go back to the beginning of current section and add osme more text to see the change in the margins\;}
}
\caption{How to write algorithms and some more text to see the effect of the change in the margins}
\end{Walgo}

\end{document}

enter image description here

The algorithm2e package stores the algorithm inside the lrbox \algocf@makethealgo and then typesets it; I defined a new environment Walgo that uses a minipage inside this lrbox; the width of the minipage is \textwidth+2\marginincrease; then, the \algocf@makethealgo is placed inside a centered \makebox to typeset it.

The Walgo environment has one optional argument (the placement specifier) and a mandatory one (to give the \marginincrease lenght used to increase the margins).

Best Answer

Related Solutions

[Tex/LaTex] How to add unnumbered lines in an algorithm

[Tex/LaTex] algorithm2e and \algomargin with negative value

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