tikz 绘图坐标装饰在点之间发生变化

Question

我有一张坐标图

\draw plot [smooth] coordinates{ (-3.1,-0.5) (-1.5,0.3) (0,0) (1.8,0.64) (3,0.5)};

有没有办法把 (0,0) 和 (1.8, 0.64) 之间的曲线画粗？

我只会绘制第二个图，但当我省略数据时，平滑度当然会有所不同。

Answer 1

您可以剪辑第二个情节：

\documentclass[tikz,border=2mm]{standalone}

\begin{document}
    \begin{tikzpicture}
        \draw plot [smooth] coordinates{ (-3.1,-0.5) (-1.5,0.3) (0,0) (1.8,0.64) (3,0.5)};

        \begin{scope} 
            \clip(0,0) rectangle (1.8,0.64);
            \draw[thick] plot [smooth] coordinates{ (-3.1,-0.5) (-1.5,0.3) (0,0) (1.8,0.64) (3,0.5)};
        \end{scope}
    \end{tikzpicture}
\end{document}