Problems with algorithm2e?

Discussion:

Alberto Simões

2007-10-03 09:12:58 UTC

Hi

I am trying to use algorithm2e together with beamer, with some
problems. And I really can't understand what's the problem with it.

Anybody used them together before, or have any idea of what it's wrong it it?
(the algorithm2e code should be alright, as I c&p it from an article I
am writing.

Thanks in Advance,
Alberto

\usepackage[linesnumbered,vlined,portugues]{algorithm2e}
..
\begin{frame}[fragile]
\begin{algorithm}
\dontprintsemicolon\SetKwComment{tcp}{$\triangleright\ $}
...
\end{algorithm}
\end{frame}

and I get

! LaTeX Error: Not in outer par mode.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.2 \dontprintsemicolon
\SetKwComment{tcp}{$\triangleright\ $}

--
Alberto Simões

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Christophe Fiorio

2007-10-04 08:08:38 UTC

Permalink

Hi,

Beamer doesn't like floating environment, so use algorithm with [H]:

\begin{algorithm}[H]
\dontprintsemicolon\SetKwComment{tcp}{$\triangleright\ $}
...
\end{algorithm}

It should work

Christophe Fiorio
------------------------------------------------------------------------
-------------------
Dpt Informatique, équipe Arith
LIRMM, 161 Rue Ada , 34392 Montpellier Cedex, FRANCE
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Post by Alberto SimÃµes
Hi
I am trying to use algorithm2e together with beamer, with some
problems. And I really can't understand what's the problem with it.
Anybody used them together before, or have any idea of what it's wrong it it?
(the algorithm2e code should be alright, as I c&p it from an article I
am writing.
Thanks in Advance,
Alberto
\usepackage[linesnumbered,vlined,portugues]{algorithm2e}
..
\begin{frame}[fragile]
\begin{algorithm}
\dontprintsemicolon\SetKwComment{tcp}{$\triangleright\ $}
...
\end{algorithm}
\end{frame}
and I get
! LaTeX Error: Not in outer par mode.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.2 \dontprintsemicolon
\SetKwComment{tcp}{$\triangleright\ $}
--
Alberto Simões
----------------------------------------------------------------------
---
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Alberto Simões

2007-10-05 14:01:46 UTC

Permalink

Yep, it worked. Thanks a lot

Cheers
Alberto

Post by Christophe Fiorio
Hi,
\begin{algorithm}[H]
\dontprintsemicolon\SetKwComment{tcp}{$\triangleright\ $}
...
\end{algorithm}
It should work
Christophe Fiorio
------------------------------------------------------------------------
-------------------
Dpt Informatique, équipe Arith
LIRMM, 161 Rue Ada , 34392 Montpellier Cedex, FRANCE
Tel: +33 467 41 86 41 - Fax: +33 467 41 85 00
http://www.lirmm.fr/~fiorio
------------------------------------------------------------------------
-------------------

--
Alberto Simões

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Tiago Rinck Caveden

2009-05-01 15:39:24 UTC

Permalink

Hello!

I found this thread through Google. Thanks for the [H] tip, it helped me.
But now I have another problem :(

If I write any simple algorithm, like a statement or simple while with
nothing special in its condition, it works fine. But if I try to put
anything like a \textlnot or math mode in the while condition, I have the
"Undefined control sequence" error for the command that closes the frame
(being it a \end{frame} or a } of a \frame, I tested for both)

For example, the following frame doesn't compile:

\frame{
\frametitle{The algorithm as we have it so far}

\begin{block}{In pseudo-language}

\begin{algorithm}[H]
\begin{algorithmic}

\WHILE{\textlnot}
\STATE {bla}
\ENDWHILE

\end{algorithmic}
\end{algorithm}
\end{block}
}

Does anyone has any idea of what's going on?

Thank you!

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Rich Shepard

2009-05-01 16:08:32 UTC

Permalink

Post by Tiago Rinck Caveden
If I write any simple algorithm, like a statement or simple while with
nothing special in its condition, it works fine. But if I try to put
anything like a \textlnot or math mode in the while condition, I have the
"Undefined control sequence" error for the command that closes the frame
(being it a \end{frame} or a } of a \frame, I tested for both)

Is your algorithm written in fonttt, that is, monospaced? If so, I suspect
that your problem comes from trying to typeset proportional-space math
within the algorithm.

If you have literal code consider writing the equations in the same style
and typeface.

On a similar theme, yesterday I discovered that in a book class document I
could get away with entering \ldots, but that caused the same error as
above, "Undefined control sequence" when used in a beamer class document.
When I changed the beamer class doc so the LaTeX read \ldots{} it happily
compiled.

Rich

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Tiago Rinck Caveden

2009-05-01 16:34:45 UTC

Permalink

Post by Rich Shepard
Is your algorithm written in fonttt, that is, monospaced?

No. Well, at least I haven't done anything to make it be.

For the record, I forgot to mention that I'm a newbie in LaTeX. :-S

Post by Rich Shepard
If you have literal code consider writing the equations in the same style
and typeface.

I didn't do anything to change style and typeface, at least not explicitly.
Or using symbols implies that?

Thanks!

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http://caveden.multiply.com