Tikzpicture：阶梯式函数

Question

该代码几乎可以正常工作。我缺少的是一种将线条连接起来的方法，使其看起来像步骤……

   \documentclass{article}
   \usepackage{pgfplots}
    \begin{document}
    \begin{figure}
        \centering
        \begin{tikzpicture}
            \begin{axis}
                [
                    xmin=0, xmax=6,
                    ymin=0, ymax=6,
                    xlabel={$t$},
                    ylabel={$\rho$},
                    axis y line=middle,
                    axis x line=middle,
                ]
                \addplot [black,domain=0:1, no marks] {6};
                \addplot [black,domain=1:2, no marks] {5};  
                \addplot [black,domain=2:3, no marks] {4};
                \addplot [black,domain=3:4, no marks] {3};
                \addplot [black,domain=4:5, no marks] {2};
                \addplot [black,domain=5:6, no marks] {1};
            \end{axis}
        \end{tikzpicture}
        \caption[some text]   {some text}
        \label{fig:someLabel}
    \end{figure}
    \end{document}

提前致谢，托马斯

Answer 1

喜欢这个吗？Pgfplots 文档，第 4.5.3 节

\documentclass{article}
   \usepackage{pgfplots}
    \begin{document}
    \begin{figure}
        \centering
        \begin{tikzpicture}
            \begin{axis}
                [
                    xmin=0, xmax=6,
                    ymin=0, ymax=6,
                    xlabel={$t$},
                    ylabel={$\rho$},
                    axis y line=middle,
                    axis x line=middle,
                ]
                \addplot [black,const plot, no marks] coordinates {(0,6) (1,5) (2,4) (3,3) (4,2) (5,1)};
%                \addplot [black,domain=1:2, no marks] {5};  
%                \addplot [black,domain=2:3, no marks] {4};
%                \addplot [black,domain=3:4, no marks] {3};
%                \addplot [black,domain=4:5, no marks] {2};
%                \addplot [black,domain=5:6, no marks] {1};
            \end{axis}
        \end{tikzpicture}
        \caption[some text]   {some text}
        \label{fig:someLabel}
    \end{figure}
    \end{document}