如何得到超過26個的子數字？

Question

具有 6 個子圖環境的程式碼會導致錯誤，但不會少，因為我用完了子圖的標籤：a)、b)、...、n)，但我需要更多

\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{subcaption}
\usepackage{pgffor}

\begin{document}

\begin{figure}
\foreach \ii in {1,...,5}{
\centering% not \center!
\begin{subfigure}{0.19\textwidth}
  \centering
  \includegraphics[scale=0.11, page=\ii]{{Rplots.bland.male.5}.pdf}
  \caption{\#\ii, ite. 1.}
\end{subfigure}
\begin{subfigure}{0.19\textwidth}
  \centering
  \includegraphics[scale=0.11, page=\ii]{{Rplots.blandmale.6}.pdf}
  \caption{\#\ii, ite. 2.}
\end{subfigure}
\begin{subfigure}{0.19\textwidth}
  \centering
  \includegraphics[scale=0.11, page=\ii]{{Rplots.bland.male.7}.pdf}
  \caption{\#\ii, ite. 3.}
\end{subfigure}
\begin{subfigure}{0.19\textwidth}
  \centering
  \includegraphics[scale=0.11, page=\ii]{{Rplots.bland.8}.pdf}
  \caption{\#\ii, ite. 4.}
\end{subfigure}
\begin{subfigure}{0.19\textwidth}
  \centering
  \includegraphics[scale=0.11, page=\ii]{{Rplots.bland.9}.pdf}
  \caption{\#\ii, ite. 5.}
\end{subfigure}
\begin{subfigure}{0.19\textwidth}
  \centering
  \includegraphics[scale=0.11, page=\ii]{{Rplots.bland.10}.pdf}
  \caption{\#\ii, ite. 6.}
\end{subfigure}
}
\end{figure}
\end{document}

錯誤

! LaTeX Error: Counter too large.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.1492 }

? 

TeXLive：2016
作業系統：Debian 8.5

Answer 1

alphalph如果字母數量用完，包包提供了一些繼續用字母編號的方法，例如：

\usepackage{alphalph}
\renewcommand*{\thesubfigure}{\alphalph{\value{subfigure}}}

完整範例：

\documentclass{article}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{pgffor}

\usepackage{alphalph}
\renewcommand*{\thesubfigure}{\alphalph{\value{subfigure}}}

\begin{document}

\newcommand*{\img}{%
  \includegraphics[
    width=\linewidth,
    height=20pt,
    keepaspectratio=false,
  ]{example-image-a}%
}

\begin{figure}
\foreach \ii in {1,...,5}{%
  \centering
  \begin{subfigure}{0.19\textwidth}
    \centering
    \img
    \caption{\#\ii, ite. 1.}
  \end{subfigure}
  \begin{subfigure}{0.19\textwidth}
    \centering
    \img
    \caption{\#\ii, ite. 2.}
  \end{subfigure}
  \begin{subfigure}{0.19\textwidth}
    \centering
    \img
    \caption{\#\ii, ite. 3.}
  \end{subfigure}
  \begin{subfigure}{0.19\textwidth}
    \centering
    \img
    \caption{\#\ii, ite. 4.}
  \end{subfigure}
  \begin{subfigure}{0.19\textwidth}
    \centering
    \img
    \caption{\#\ii, ite. 5.}
  \end{subfigure}
  \begin{subfigure}{0.19\textwidth}
    \centering
    \img
    \caption{\#\ii, ite. 6.}
  \end{subfigure}
}%
\lastlinefit=1000 % same inter-image spaces in last line as in previous lines
\end{figure}

\end{document}

Answer 2

\alph如果您使用or\Alph且值大於 26，則會出現該錯誤。

如果您需要的值大於該值，則需要不同的顯示功能。