如何简单地索引网格的坐标

Question

我想要画这个图：

使用以下内容：

\documentclass{article}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
    \begin{axis}[grid=major]

    \end{axis}
    \end{tikzpicture}

\end{document}

但我不确定这是否是最佳解决方案。有人能帮助我吗？

Answer 1

我远不能声称这是“最佳”解决方案，但肯定可以向您的代码添加一些成分，以使结果非常接近所需的屏幕截图。

\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{tikzpicture}
    \begin{axis}[width=0.8\textwidth,
        axis equal image,
        grid=major,grid style={densely dotted,help lines},
        axis x line=bottom,
        xmin=-0.5,xmax=9.5,xtick={0,1,...,9},xticklabel=$x_{\pgfmathprintnumber\tick}$,
        axis y line=box,
        ymin=0,ymax=4.2,ytick={0,1,...,4},yticklabel=$t^{\pgfmathprintnumber\tick}$,
        axis line style={draw,thick,-},
        ]
        \path (0,0) coordinate (O) (1,1) coordinate (X) (9,0) coordinate (9);
    \end{axis}
    \draw[dashed,<->] ([yshift=-1cm]current axis.south-|O) -- 
        node[below] {$h$} ([yshift=-1cm]current axis.south-|X);
    \draw[dashed,<->] ([xshift=-1cm]current axis.west|-O) -- 
        node[left] {$k$} ([xshift=-1cm]current axis.west|-X);
    \draw[->] (9) -- ++ (1,0);  
    \path (current axis.south west) node[below]{$0$};
\end{tikzpicture}
\end{document}