发现散点图的点

Question

有一个与此处（几乎）最小示例类似的情节：

\documentclass{beamer}

\usepackage{pgfplots}
\pgfplotsset{compat=1.18}

\begin{document}
\begin{frame}
    \begin{tikzpicture}
        \begin{axis}[
            axis x line = bottom,
            axis y line = left,
            ]

            \addplot3[
                samples at = {1.3, 2, 2.55, 3.5, 5.7, 12},
                samples y =0,
                point meta=(x-0.5)^2 + y^2,
                mark = *,
                only marks,
                scatter,
                ]
                ({sin(x)}, {cos(x)}, {1/x});
        \end{axis}
    \end{tikzpicture}
\end{frame}
\end{document}

是否可以使用投影仪叠加技术一次一个地发现单个样本？

Answer 1

不使用任何库的版本，仅\pause通过添加scatter/@post marker code：

\documentclass{beamer}

\usepackage{pgfplots}
\pgfplotsset{compat=1.18}

\begin{document}
\begin{frame}
    \begin{tikzpicture}
        \begin{axis}[
            axis x line = bottom,
            axis y line = left,
            scatter/@pre marker code/.code={},
            scatter/@post marker code/.code={\pause}
            ]

            \addplot3[
                samples at = {1.3, 2, 2.55, 3.5, 5.7, 12},
                samples y =0,
                point meta=(x-0.5)^2 + y^2,
                mark =*,
                only marks,
                scatter,
                ]
                ({sin(x)}, {cos(x)}, {1/x});
        \end{axis}
     \onslide<1->% see comments
    \end{tikzpicture}
\end{frame}
\end{document}

Answer 2

您可以使用该overlay-beamer-styles库：

\documentclass{beamer}

\usepackage{pgfplots}
\pgfplotsset{compat=1.18}
\usetikzlibrary{overlay-beamer-styles}

\begin{document}
\begin{frame}
    \begin{tikzpicture}
        \begin{axis}[
            axis x line = bottom,
            axis y line = left,
            ]

            \addplot3[
                samples at = {1.3, 2, 2.55, 3.5, 5.7,12},
                samples y =0,
                point meta=(x-0.5)^2 + y^2,
                mark = *,
                only marks,
                scatter,
                scatter src=z,
                scatter/use mapped color={draw=mapped
                color!80!black,fill=mapped color,visible on=<+->}
            ]
                ({sin(x)}, {cos(x)}, {1/x});
        \end{axis}
    \end{tikzpicture}
\end{frame}
\end{document}