更改 pgfplots 散点图中标记标签的字体大小

Question

如何更改 pgfplots 散点图中标记标签的字体大小？我尝试过 label style={font=\small}以及\pgfplotsset添加scatter/@pre marker code/.code={font=\small}，但无济于事。

MWE 如下：

\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\begin{document}
\begin{tikzpicture} 
\begin{axis}[
    xlabel=$a$,
    ylabel=$b$
]
\addplot[blue,mark=*,mark options={fill=blue},nodes near coords,only marks,
   point meta=explicit symbolic] table[meta=label] {
x y label
100 150 1
200 180 2
};
\end{axis}
\end{tikzpicture}
\end{document} 

谢谢！

Answer 1

您必须every node near coord/.append style={font=\small}在选项中使用axis或addplot或\pgfplotsset。

\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
    xlabel=$a$,
    ylabel=$b$,
    every node near coord/.append style={font=\small}
]
\addplot[blue,mark=*,mark options={fill=blue},nodes near coords,only marks,
   point meta=explicit symbolic] table[meta=label] {
x y label
100 150 1
200 180 2
};
\end{axis}
\end{tikzpicture}
\end{document}