General ⇒ Conditional Constructs in Counter Definition

[dinya]

Hello all!

I need to implement different value of \thefigure as a function of \value{section}.
Something like that:

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\renewcommand{\thefigure}{%
  \ifthenelse{\value{section} = 0}}%
      {\theappendix.\arabic{figure}}
      {\thesection.\arabic{figure}}
  }

But this construction causes

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! Illegal parameter number in definition of \@currentlabel.

I use XeLaTeX, but I don't think it's reason.

Thanks in advance.

[cgnieder]

Hi,

the definition is flawed: the braces are not balanced. But it isn't working even when they are. The test by \ifthenelse is going wrong. I would do something like this:

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% arara: pdflatex
\documentclass{article}
\begin{document}
\newcommand*\theappendix{A}

\renewcommand\thefigure{%
  \ifnum\value{section}=0%
    \theappendix.\arabic{figure}%
  \else
    \thesection.\arabic{figure}%
  \fi}

\begin{figure}[ht]
 a figure
 \caption{blub}
\end{figure}

\section{Test}

\begin{figure}[ht]
 a figure
 \caption{blah}
\end{figure}

\end{document}

I don't know where \theappendix is defined? Do you have more than one appendix and are counting them?

Regards

[dinya]

Thanks.

TeX \ifnum works for me. I have more than one appendix.

[cgnieder]

I was being sloppy... please change the line

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\ifnum\value{section}=0%

from my code into

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\ifnum\value{section}=0\relax

if you're using it.