[Tex/LaTex] Pseudocode with the procedure in caption

algorithmicxalgorithmscaptions

I am trying to have pseudocode similar to that in this article. I am currently using the algorithmicx package. My problem is that I would like to have the caption look like below:

So in caps and complete with arguments. I can't seem to figure out how to do this. Below is an example. Basically I would want the "Euclid(a,b)" to be in the caption, instead of the body after procedure.

\documentclass[11pt]{article} 

\usepackage[utf8]{inputenc}
\usepackage{algorithm}
\usepackage[noend]{algpseudocode}

\floatname{algorithm}{Procedure}
\renewcommand{\algorithmicrequire}{\textbf{Input:}}
\renewcommand{\algorithmicensure}{\textbf{Output:}}
\renewcommand\thealgorithm{}

\begin{document}

\begin{algorithm}
\caption{Euclid’s algorithm}
\begin{algorithmic}[1]
\Require Integers $a$ and $b$
\Ensure The g.c.d of $a$ and $b$
\Procedure{Euclid}{$a,b$}
\State $r\gets a\bmod b$
\While{$r\not=0$}
\State $a\gets b$
\State $b\gets r$
\State $r\gets a\bmod b$
\EndWhile
\State \textbf{return} $b$
\EndProcedure
\end{algorithmic}
\end{algorithm}

\end{document}

Best Answer

The trick is to use \textproc, as below:

\documentclass[11pt]{article} 

\usepackage[utf8]{inputenc}
\usepackage{algorithm}
\usepackage[noend]{algpseudocode}

\floatname{algorithm}{Procedure}
\renewcommand{\algorithmicrequire}{\textbf{Input:}}
\renewcommand{\algorithmicensure}{\textbf{Output:}}
\renewcommand\thealgorithm{}

\begin{document}

\begin{algorithm}
\caption{\textproc{Euclid}$(a,b)$}
\begin{algorithmic}[1]
\Require Integers $a$ and $b$
\Ensure The g.c.d of $a$ and $b$
\State $r\gets a\bmod b$
\While{$r\not=0$}
\State $a\gets b$
\State $b\gets r$
\State $r\gets a\bmod b$
\EndWhile
\State \textbf{return} $b$
\end{algorithmic}
\end{algorithm}

\end{document}

This results in

Incidentally, this is also useful when you wish to refer to an algorithm in the text.

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You are setting your algorithm inside an algorithm floating environment. And, floats are set (by default) to have full width (\textwidth). It seems like you wish to retain the "floating" structure (ruled) without the floating behaviour (since you're setting it in a list). Then you need to do two things:

Set the float inside a minipage of width \linewidth which adapts to the width of the line inside lists (see Difference between \textwidth, \linewidth and \hsize); and
Due to (1) above, you need to remove the floating behaviour and set it using the [H] float specifier (provided by float which is loaded by algorithm).

Here's the end result in the form of a MWE:

enter image description here

\documentclass{article}
\usepackage{algorithm,algpseudocode}% http://ctan.org/pkg/{algorithms,algorithmicx}
\begin{document}
\begin{enumerate} 
  \item Some text\ldots\par
  \vspace{-\baselineskip}

  \begin{minipage}{\linewidth}
  \begin{algorithm}[H]
    \caption{Euclid’s algorithm}\label{euclid}
    \begin{algorithmic}[1]
      \Procedure{Euclid}{$a,b$}\Comment{The g.c.d. of a and b}
        \State $r\gets a\bmod b$
        \While{$r\not=0$}\Comment{We have the answer if r is 0}
          \State $a\gets b$
          \State $b\gets r$
          \State $r\gets a\bmod b$
        \EndWhile\label{euclidendwhile}
        \State \textbf{return} $b$\Comment{The gcd is b}
      \EndProcedure
    \end{algorithmic}
  \end{algorithm}
  \end{minipage}

  Some more text\ldots
\end{enumerate}
\end{document}

Best Answer

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