在笛卡尔坐标上画线

Question

我该如何将其表达为 LaTeX 代码？我是新手，我不知道该怎么做（我认为它需要pgfplots/ tikz）。谢谢！

Answer 1

与您开始绘制的内容类似pgfplots：

\documentclass[border=1cm]{standalone}
\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
    
     \begin{axis}[
        axis lines=middle,
        grid=both,
        grid,
        ymin=-5,
        ymax=5,
        xmin=-5, 
        xmax=5,
        xtick = {-5,...,5},
        ytick = {-5,...,5},
        ]       
        
        \draw[stealth-stealth,very thick] (axis cs:-4,-4) -- (axis cs:3,4) node[below right] at (axis cs:0,0) {A};
        \draw[stealth-stealth,very thick] (axis cs:-2,-3) -- (axis cs:-2,4) node[left] at (axis cs:-2,1) {B};
    
        \end{axis}
\end{tikzpicture}

\end{document}

Answer 2

这只是略微改进的版本罗兰的回答。

% used PGFPlots v1.18.1
\documentclass[border=5pt]{standalone}
\usepackage{pgfplots}
    % use this `compat` level or higher to place TikZ coordinates by default
    % in axis coordinates. That means TikZ coordinates don't have to be given
    % the coordinate system `axis cs:` explicitly.
    % It is best practice to use the actual version, i.e. here it would be 1.18.
    % That ensures that you use the most recent features.
    \pgfplotsset{compat=1.11}
\begin{document}
\begin{tikzpicture}[
    % create a style for the lines that can later be used
    my line style/.style={
        >=stealth,
        <->,
        very thick,
    }
]
    \begin{axis}[
        axis lines=middle,
        grid=both,
        grid,
        ymin=-5,
        ymax=5,
        xmin=-5,
        xmax=5,
        xtick distance=1,
        ytick distance=1,
    ]

        \draw [my line style] (-4,-4) -- ( 3,4)
            % to place a node long the path either give everything explicitly ...
            node [below right,red] at (0,0) {A};
        \draw [my line style] (-2,-3) -- (-2,4)
            % ... or a bit simplified.
            node [auto,pos=0.6] {B};

    \end{axis}
\end{tikzpicture}
\end{document}