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I want to type an algorithm in ieee format. I have used algorithmic package. But using that package, I couldn't type a caption to the algorithm and "Algorithm " above the written algorithm. What should I do to get those things written in my algorithm ? I need the algorithm as in the given figure.enter image description here

The structure I have used is given below 

 \documentclass{IEEEtran}
 \usepackage{algorithmic}
 \begin{document}
 %\begin{algorithm}
 %\caption{Algorithm for ...}
 \begin{algorithmic}[1]
 \renewcommand{\algorithmicrequire}{\textbf{Input:}}
 \renewcommand{\algorithmicensure}{\textbf{Output:}}
 \REQUIRE in
 \ENSURE  out
 \\ \textit{Initialisation} :
  \STATE first statement
 \\ \textit{LOOP Process}
  \FOR {$i = l-2$ to $0$}
  \STATE statements..
  \IF {($i \ne 0$)}
  \STATE statement..
  \ENDIF
  \ENDFOR
 \RETURN $P$ 
 \end{algorithmic} 
 %\end{algorithm}
 \end{document}
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3
  • @vijita: \caption does not work outside of a floating environment ... algoritmic seems to be is a non-floating environment, but perhaps, there are package options to 'cure' this Commented Dec 29, 2014 at 9:23
  • @ChristianHupfer IEEE format is not compatible with the floating environment. Yes the \caption{} is not working \begin{algorithm} also. But I need that. That is why I have commented those things. Which package I have to use? can you please suggest any. Commented Dec 29, 2014 at 9:30
  • @vijita: I found the error, but Herbert was quicker in posting the same solution, see his answer and consider to accept it please, since it works ;-) Commented Dec 29, 2014 at 9:32

2 Answers 2

Reset to default
18

First of all, if you want to use the algorithm environment and also want to respect the IEEE format (which doesn't allow it to float), you can use the H floating specifier to tell algorithm not to float:

\begin{algorithm}[H]

Then, it seems that you want to use the ruled style for the algorithm environment, but without lines.

This can be achieved defining a new floating style (the algorithm package loads the float package), let's say norules, which has no rules

\makeatletter
\newcommand\fs@norules{\def\@fs@cfont{\bfseries}\let\@fs@capt\floatc@ruled
  \def\@fs@pre{}%
  \def\@fs@post{}%
  \def\@fs@mid{\kern3pt}%
  \let\@fs@iftopcapt\iftrue}
\makeatother

and applying it to the algorithm environment

\floatstyle{norules}
\restylefloat{algorithm}

MWE:

\documentclass{IEEEtran}

\usepackage{algorithm}
\usepackage{algorithmic}

\makeatletter
\newcommand\fs@norules{\def\@fs@cfont{\bfseries}\let\@fs@capt\floatc@ruled
  \def\@fs@pre{}%
  \def\@fs@post{}%
  \def\@fs@mid{\kern3pt}%
  \let\@fs@iftopcapt\iftrue}
\makeatother
\floatstyle{norules}
\restylefloat{algorithm}

\begin{document}

 \begin{algorithm}[H]
 \caption{Algorithm for ...}
 \begin{algorithmic}[1]
 \renewcommand{\algorithmicrequire}{\textbf{Input:}}
 \renewcommand{\algorithmicensure}{\textbf{Output:}}
 \REQUIRE in
 \ENSURE  out
 \\ \textit{Initialisation} :
  \STATE first statement
 \\ \textit{LOOP Process}
  \FOR {$i = l-2$ to $0$}
  \STATE statements..
  \IF {($i \ne 0$)}
  \STATE statement..
  \ENDIF
  \ENDFOR
 \RETURN $P$
 \end{algorithmic}
 \end{algorithm}

\end{document}

Output:

enter image description here

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5
  • for helping me. :) Commented Dec 29, 2014 at 18:19
  • @vijita You're welcome. Anyway it seems that Herbert's answer was what you were lookin for ;-) Commented Dec 29, 2014 at 18:21
  • :-) I was lookin for algorithm in IEEE format. I think herbert's ans also gives algorithm in IEEE format and I 've made it as ans before ur post. Commented Dec 29, 2014 at 18:37
  • @vijita Happy you've solved, anyway. Commented Dec 29, 2014 at 18:39
  • :) me too.. of course with the help of u people... :) Commented Dec 29, 2014 at 18:47
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Load also algorithm:

\documentclass{IEEEtran}
\usepackage{algorithm,algorithmic}
\begin{document}
 \begin{algorithm}
 \caption{Algorithm for ...}
 \begin{algorithmic}[1]
 \renewcommand{\algorithmicrequire}{\textbf{Input:}}
 \renewcommand{\algorithmicensure}{\textbf{Output:}}
 \REQUIRE in
 \ENSURE  out
 \\ \textit{Initialisation} :
  \STATE first statement
 \\ \textit{LOOP Process}
  \FOR {$i = l-2$ to $0$}
  \STATE statements..
  \IF {($i \ne 0$)}
  \STATE statement..
  \ENDIF
  \ENDFOR
 \RETURN $P$ 
 \end{algorithmic} 
 \end{algorithm}

\end{document}

enter image description here

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3
  • Thank you @Herbert . Can I remove that lines in between? Commented Dec 29, 2014 at 9:39
  • 1
    After loading package algorithm write \floatstyle{plaintop} \restylefloat{algorithm} Commented Dec 29, 2014 at 10:33
  • By default the IEEEtran centers a caption if it is shorter than a line Commented Dec 29, 2014 at 10:45

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