改变箭头的宽度

Question

这是我的代码的 MWE：

\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}

\usepackage{tikz}
\usetikzlibrary{shapes,arrows}


\tikzset{
    myarrow/.style={
        draw,
        fill=black,
        single arrow,
        minimum height=2.5ex,
        line width=1pt,
        single arrow head extend=0.1ex
    }
}

\newcommand{\arrowup}{%
\tikz [baseline=-0.5ex]{\node [myarrow,rotate=90] {};}
}
\newcommand{\arrowdown}{%
\tikz [baseline=-1ex]{\node [myarrow,rotate=-90] {};}
}


\begin{document}

\begin{center}
This is some text.\\
\arrowdown\\
And some more.\\
\arrowup\\
And even more.
\end{center}

\end{document}

这给了我这个：

这只line width会将箭头的宽度减小到一定程度，但不会再减小了。我希望箭头看起来更细一点。我正在使用PDFLaTeXUbuntu 12.10 进行编译。谢谢。

Answer 1

对于调整箭头节点，TiKz 手册列出了以下选项：single arrow head extend、inner sep=和single arrow head indent。我想添加yscale或xscale选项。使用这些值，您可能会得到所需的外观。

\documentclass[a4paper,10pt]{article}

\usepackage{tikz}
\usetikzlibrary{shapes,arrows}

\tikzset{
    myarrow/.style={
        draw,
        fill=black,
        single arrow,
        minimum height=2.5ex,
        line width=1pt,
        single arrow head extend=0.1ex
    }
}

\newcommand{\arrowup}{%
\tikz [baseline=-0.5ex]{\node [myarrow,rotate=90, single arrow head extend=2mm,inner sep=.1mm] {};}% or: single arrow head indent=⟨length⟩
}
\newcommand{\arrowdown}{%
\tikz [baseline=-1ex]{\node [myarrow,rotate=-90,  yscale=.5, single arrow head extend=1mm] {};}
}

\begin{document}

\begin{center}
This is some text.\\
\arrowdown\\
And some more.\\
\arrowup\\
And even more.
\end{center}

\end{document}

在这个例子中，我特别喜欢第二个（向下）箭头。