我对以下代码有一些问题：
\begin{figure}
\caption{test}\label{fig:sourceType}
\begin{center}
\begin{tikzpicture}
\begin{axis}[
xbar,
reverse legend,
width = \textwidth,
height = \textheight,
symbolic y coords={motorway,primary,secondary,tertiary,unclassified/unknown,service},
xticklabel={\pgfmathparse{\tick*100}\pgfmathprintnumber{\pgfmathresult}\%},
xlabel = Relative frequency
]
\addplot[blue!20!black,fill=blue!10!white] coordinates {
(0.0135,motorway)
(0.02,primary)
(0.0797,secondary)
(0.1027,tertiary)
(0.1453,unclassified/unknown)
(0.1904,service)
};
\addplot[blue!20!black,fill=blue!40!white] coordinates {
(0.0129,motorway)
(0.0192,primary)
(0.0821,secondary)
(0.1121,tertiary)
(0.1656,unclassified/unknown)
(0.1762,service)
};
\addplot[blue!20!black,fill=blue!70!white] coordinates {
(0.0119,motorway)
(0.0199,primary)
(0.0767,secondary)
(0.1117,tertiary)
(0.1751,unclassified/unknown)
(0.1813,service)
};
\addplot[blue!20!black,fill=blue!100!white] coordinates {
(0.0154,motorway)
(0.0231,primary)
(0.0805,secondary)
(0.1052,tertiary)
(0.1444,unclassified/unknown)
(0.1871,service)
};
\addplot[red!20!black,fill=red!80!white] coordinates {
(0.0159,motorway)
(0.0158,primary)
(0.072,secondary)
(0.0895,tertiary)
(0.1189,unclassified/unknown)
(0.2129,service)
};
\legend {Stgt};
\end{axis}
\end{tikzpicture}
\end{center}
\end{figure}
结果如下：
我如何去掉重复的 y 标签，只保留中间的标签（需要明确哪 5 个条属于哪个标签）？高度仅选择为最大值以使条不重叠，并且可以随时更改。提前致谢 :D