Macros for drawing charts in NLP

drawchart.tex

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\documentclass{beamer}
\usepackage{palatino}
\usefonttheme{structurebold}
\setbeamertemplate{navigation symbols}{}
\usepackage{ifthen}
\usepackage{calc}
\usepackage{tikz}

\newcounter{myrangex}
\def\internalinitchart#1#2{
  \foreach \x in {0, ..., #1} {
    \coordinate [label=below:\x] (\x) at (\x * 2,0);
  }
  \foreach \x in {0, ..., #2} {
    \draw (\x, \x + 1) -- (2 * \x + 1,  0);
    \draw (#1 + 1 + \x, #1 - \x) -- (2 * \x + 1, 0);
  }
  \draw (#1, #1+1) -- (2 * #1, 1);
  \draw (#1, #1+1) -- (0, 1);
}

\def\drawchart#1{
  \setcounter{myrangex}{#1-1}
  \internalinitchart{#1}{\themyrangex}
}

\def\chartcoordinate#1#2{
  \node at (#1+#2, #2-#1) {#1,#2};
}

\def\chartentry#1#2#3{
  \node at (#1+#2, #2-#1) {\small #3};
}

\def\fillchartcell#1#2{
  \filldraw [green!60, draw=black] (#1+#2-1, #2-#1) -- (#1+#2, #2-#1 + 1) -- (#1 + #2 + 1, #2-#1) -- (#1+#2, #2-#1-1) -- (#1 + #2 - 1, #2-#1);
  % \node [rectangle,fill=red!50, draw=black,rotate=45, inner sep=20pt] at (#1+#2, #2-#1) {};
}

\title{Macros for Drawing Charts in \\Natural Language Processing}
\author{Tetsuo Kiso}
\date{\today}

\begin{document}

\begin{frame}
  \titlepage
\end{frame}

\begin{frame}[fragile]{Basics}
\begin{verbatim*}
\drawchart{5};
\end{verbatim*}
  \begin{tikzpicture}
    \drawchart{5};
  \end{tikzpicture}
\end{frame}

\begin{frame}[fragile]{Bigger Charts}
\begin{verbatim*}
\drawchart{30};
\end{verbatim*}
  \begin{center}
  \begin{tikzpicture}[scale=0.15]
    \drawchart{30};
  \end{tikzpicture}
  \end{center}
\end{frame}

\begin{frame}[fragile]{Specifying coordinates}
\begin{verbatim*}
\chartcoordinate{0}{5};
\end{verbatim*}%
  \begin{tikzpicture}
    \drawchart{5};
    \foreach \x in {0, ..., 5} {
    \foreach \y in {1, ..., 5} {
      \ifthenelse{\x < \y}{
        \chartcoordinate{\x}{\y};
      }
    }
  }
  \end{tikzpicture}
\end{frame}

\begin{frame}[fragile]{Filling chart cells}
\begin{verbatim*}
\chartcoordinate{0}{5};
\end{verbatim*}
  \begin{tikzpicture}
    \drawchart{5};
    \fillchartcell{0}{5};
    \chartcoordinate{0}{5};
  \end{tikzpicture}
\end{frame}
\end{document}

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