如何使用 pgf 和 \thisrow 解析和打印字符 {}？

Question

我有一个带有“{}”的数据表，我想保留这些字符。

结果：

我想从解析中取消忽略这个字符并将其打印在图像上。

我知道我可以改变：

nodes near coords*={\label},

到

nodes near coords*={\{\label\}},

但这不允许我打印类似 {{N}{F}} 的内容

我当前的乳胶代码：

\documentclass[tikz,border=10pt,multi]{standalone}
\usepackage{xparse}
\usetikzlibrary{3d}
\usepackage{pgfplots}
\usepackage{pgfplotstable}

\usepackage[utf8]{inputenc} %unicode support
\usepackage{lmodern}
\usepackage{graphicx}

\pgfplotsset{width=7cm,compat=1.12} 

    \begin{tikzpicture}
        \begin{axis}[
                        separate axis lines,
                        axis lines=left,
                        every outer x axis line/.append style={-stealth},
                        every outer y axis line/.append style={-stealth},
                        xmin=-1,xmax=7,
                        ymin=-1,ymax=7, 
                        xticklabels=\empty,
                        yticklabels=\empty,
                        zticklabels=\empty,
                        xlabel=$t$,
                        ylabel=$i$
                    ]
        \addplot[
                    nodes near coords*={\label},
                    nodes near coords align={right},
                    every node near coord/.style={font=\tiny,black},
                    mark=*,
                    only marks,
                    scatter,
                    visualization depends on={value \thisrow{label} \as \label}
                ] table[x=t,y=i,meta=label]{
t f i label
0 6 0 {F}
6 0 0 {T}
3 3 0 {N}
3 3 3 {FT}
0 6 3 {NF}
6 0 3 {NT}
3 3 6 {NFT}
};
        % F - FT
        \draw[black,-] (0,0) to (3,3);
        % F - NF
        \draw[black,-] (0,0) to (0,3);
        % NF - NFT
        \draw[black,-] (0,3) to (3,6);
        % NFT - FT
        \draw[black,-] (3,6) to (3,3);
        % NFT - NT
        \draw[black,-] (3,6) to (6,3);
        % NT - T
        \draw[black,-] (6,3) to (6,0);
        % T - FT
        \draw[black,-] (6,0) to (3,3);
        % N - NF
        \draw[black,-] (3,0) to (0,3);
        % N - NT
        \draw[black,-] (3,0) to (6,3);
        \end{axis}
    \end{tikzpicture}

\end{document}

感谢您的帮助

Answer 1

如果你想打印括号中，你必须告诉 LaTeX：将数据更改为

t f i label
0 6 0 \{F\}
6 0 0 \{T\}
3 3 0 \{N\}
3 3 3 \{FT\}
0 6 3 \{NF\}
6 0 3 \{NT\}
3 3 6 \{NFT\}

你会得到

这是完整代码。我只是在相关位置将{和}改为\{和 ，并添加了。\}\begin{document}

\documentclass[tikz,border=10pt,multi]{standalone}
\usepackage{xparse}
\usetikzlibrary{3d}
\usepackage{pgfplots}
\usepackage{pgfplotstable}

\usepackage[utf8]{inputenc} %unicode support
\usepackage{lmodern}
\usepackage{graphicx}

\pgfplotsset{width=7cm,compat=1.12} 

\begin{document}

    \begin{tikzpicture}
        \begin{axis}[
                        separate axis lines,
                        axis lines=left,
                        every outer x axis line/.append style={-stealth},
                        every outer y axis line/.append style={-stealth},
                        xmin=-1,xmax=7,
                        ymin=-1,ymax=7, 
                        xticklabels=\empty,
                        yticklabels=\empty,
                        zticklabels=\empty,
                        xlabel=$t$,
                        ylabel=$i$
                    ]
        \addplot[
                    nodes near coords*={\label},
                    nodes near coords align={right},
                    every node near coord/.style={font=\tiny,black},
                    mark=*,
                    only marks,
                    scatter,
                    visualization depends on={value \thisrow{label} \as \label}
                ] table[x=t,y=i,meta=label]{
t f i label
0 6 0 \{F\}
6 0 0 \{T\}
3 3 0 \{N\}
3 3 3 \{FT\}
0 6 3 \{NF\}
6 0 3 \{NT\}
3 3 6 \{NFT\}
};
        % F - FT
        \draw[black,-] (0,0) to (3,3);
        % F - NF
        \draw[black,-] (0,0) to (0,3);
        % NF - NFT
        \draw[black,-] (0,3) to (3,6);
        % NFT - FT
        \draw[black,-] (3,6) to (3,3);
        % NFT - NT
        \draw[black,-] (3,6) to (6,3);
        % NT - T
        \draw[black,-] (6,3) to (6,0);
        % T - FT
        \draw[black,-] (6,0) to (3,3);
        % N - NF
        \draw[black,-] (3,0) to (0,3);
        % N - NT
        \draw[black,-] (3,0) to (6,3);
        \end{axis}
    \end{tikzpicture}

\end{document}