7

I've been trying to use this answer Changing label name for algorithm to no avail. I use the packages:

\usepackage{algorithm}
\usepackage{algpseudocode}

And this code for defining new environment:

\newenvironment{megaalgorithm}[1][htb]{
    \renewcommand{\algorithmcfname}{MegaAlgorithm}% Update algorithm name
   \begin{algorithm}[#1]%
  }{\end{algorithm}}

But then it tells me that there is an error:

Latex Error: \algorithmcfname undefined

I can't use algorithm2e as in previous example as it breaks my current code.

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2
  • Untested, due to the lack of an MWE: \makeatletter\renewcommand{\ALG@name}{MEGAAlgorithm}\makeatother Commented Feb 27, 2015 at 18:49
  • 1
    Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. Commented Feb 27, 2015 at 18:52

1 Answer 1

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15

The right one when using the algorithm package is \ALG@name and not \algorithmcfname.

So you have to define your new environment as

\makeatletter
\newenvironment{megaalgorithm}[1][htb]{%
    \renewcommand{\ALG@name}{MegaAlgorithm}% Update algorithm name
   \begin{algorithm}[#1]%
  }{\end{algorithm}}
\makeatother

MWE

\documentclass{article}
\usepackage{algorithm}
\usepackage{algpseudocode}

\makeatletter
\newenvironment{megaalgorithm}[1][htb]{%
    \renewcommand{\ALG@name}{MegaAlgorithm}% Update algorithm name
   \begin{algorithm}[#1]%
  }{\end{algorithm}}
\makeatother

\begin{document} 

\begin{megaalgorithm}
\begin{algorithmic}
\State Hello
\end{algorithmic}
\caption{A mega algorithm}
\end{megaalgorithm}

\end{document}

enter image description here

In algorithm.sty (part of the algorithms bundle) you can find:

\newcommand{\ALG@name}{Algorithm}

and

\floatname{algorithm}{\ALG@name}

So, another option is to define your new environment as

\newenvironment{megaalgorithm}[1][htb]{%
    \floatname{algorithm}{MegaAlgorithm}% Update algorithm name
   \begin{algorithm}[#1]%
  }{\end{algorithm}}

The first method is taken directly from the style file, while the latter can be found in subsection 4.4, "Customization", of the algorithms documentation

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4
  • Thank you! For the future, where should I look for things like \ALG@name, I haven't been able to find anything like this in the algorithmicx documentation. Commented Feb 28, 2015 at 13:48
  • @paewel You're welcome. I've added some explanations in the edit. Commented Feb 28, 2015 at 16:45
  • How can I use separate numbering for this new environment. My document has both the basic algorithm environment as well as the newly defined one. Commented Oct 13, 2018 at 16:42
  • 1
    My first instinct would be to use \floatname{algorithm}{MegaAlgorithm}, since that's what the package manual says to use. Why might you want to use \renewcommand{\ALG@name}{MegaAlgorithm} (surrounded by \makeatletter and \makeatother)? Commented Jan 11, 2019 at 15:10

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