我正在尝试在“tikzpicture”中的条形图中的条形顶部添加一个圆圈。我的问题是我无法让条形顶部的圆圈以条形为中心。它们目前以 x 轴上的标签为中心。有人能解决这个问题吗？欢迎提出任何其他改进我的代码的建议！
\documentclass[]{article}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\usepackage{filecontents}
\begin{document}
\begin{filecontents}{testdata.csv}
index, first, second
1, 28, 42
2, 16, 8
3, 7, 0
4, 6, 8
5, 5, 8
6, 2, 0
7, 3, 0
8, 1, 0
9, 4, 8
10, 4, 0
11, 6, 17
12, 2, 0
13, 0, 0
14, 3, 0
15, 2, 0
16, 2, 0
17, 1, 0
18, 0, 0
19, 1, 0
20, 1, 0
21, 1, 0
22, 0, 0
23, 0, 0
24, 0, 0
25, 0, 0
26, 0, 0
27, 1, 0
28, 0, 0
29, 0, 0
30, 0, 0
31, 1, 8
32, 1, 0
33, 0, 0
34, 1, 0
35, 1, 0
\end{filecontents}
\pgfplotstableread[col sep=comma]{testdata.csv}\datatable
\begin{tikzpicture}[trim axis left]
\begin{axis}[
x tick label style={
/pgf/number format/1000 sep=},
scale only axis,
height=12cm,
width=\textwidth,
ybar=0pt,
ymin=0,
every node near coord/.append style={font=\footnotesize},
xtick=data,
xticklabels from table={\datatable}{index},
xticklabel style={rotate=90},
yticklabel={\pgfmathparse{\tick*1}\pgfmathprintnumber{\pgfmathresult}\%},
yticklabel style={font=\scriptsize},
ymajorgrids,
xmajorgrids,
bar width=0.1cm,
xticklabel style={font=\tiny},
enlarge x limits=0.01,
enlarge y limits={value=0.15,upper},
]
\addplot+[mark=*, red, nodes near coords={\pgfmathfloatifflags{\pgfplotspointmeta}{0}{}{\pgfmathprintnumber{\pgfplotspointmeta}\%}},] table [x=index, y=first] {\datatable};
\addplot+[style={blue,fill=blue,mark=*},nodes near coords={\pgfmathfloatifflags{\pgfplotspointmeta}{0}{}{\pgfmathprintnumber{\pgfplotspointmeta}\%}},] table [x=index, y=second] {\datatable};
\end{axis}
\end{tikzpicture}
\end{document}
答案1
您可以使用mark options={xshift=\pgfplotbarshift}：
代码：
\documentclass[]{article}
\usepackage{pgfplotstable}% loads pgfplots
\pgfplotsset{compat=1.14}% <- added
\usepackage{filecontents}
\begin{document}
\begin{filecontents}{testdata.csv}
index, first, second
1, 28, 42
2, 16, 8
3, 7, 0
4, 6, 8
5, 5, 8
6, 2, 0
7, 3, 0
8, 1, 0
9, 4, 8
10, 4, 0
11, 6, 17
12, 2, 0
13, 0, 0
14, 3, 0
15, 2, 0
16, 2, 0
17, 1, 0
18, 0, 0
19, 1, 0
20, 1, 0
21, 1, 0
22, 0, 0
23, 0, 0
24, 0, 0
25, 0, 0
26, 0, 0
27, 1, 0
28, 0, 0
29, 0, 0
30, 0, 0
31, 1, 8
32, 1, 0
33, 0, 0
34, 1, 0
35, 1, 0
\end{filecontents}
\pgfplotstableread[col sep=comma]{testdata.csv}\datatable
\begin{tikzpicture}[trim axis left]
\begin{axis}[
x tick label style={
/pgf/number format/1000 sep=},
scale only axis,
height=12cm,
width=\textwidth,
ybar=0pt,
ymin=0,
every node near coord/.append style={font=\footnotesize},
xtick=data,
xticklabels from table={\datatable}{index},
xticklabel style={rotate=90},
yticklabel={\pgfmathparse{\tick*1}\pgfmathprintnumber{\pgfmathresult}\%},
yticklabel style={font=\scriptsize},
ymajorgrids,
xmajorgrids,
bar width=0.1cm,
xticklabel style={font=\tiny},
enlarge x limits={abs=\pgfplotbarwidth},% <- changed
enlarge y limits={value=0.15,upper},
%%
nodes near coords={\pgfmathfloatifflags{\pgfplotspointmeta}{0}{}
{\pgfmathprintnumber{\pgfplotspointmeta}\%}},
mark options={xshift=\pgfplotbarshift},% <- added
]
\addplot+[red,mark=*] table [x=index, y=first] {\datatable};
\addplot+[blue,mark=*] table [x=index, y=second] {\datatable};
\end{axis}
\end{tikzpicture}
\end{document}