我有这个代码：
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepackage{tikz}
\pgfplotsset{compat=1.15}
\usetikzlibrary{patterns}
\newcounter{cheat}
\definecolor{trolleygrey}{rgb}{0.5, 0.5, 0.5}
\definecolor{darkgray}{rgb}{0.66, 0.66, 0.66}
\title{pgfplots}
\author{antonis.makris2411 Mak}
\date{July 2019}
\begin{document}
\maketitle
\begin{figure*}[!htbp]
\begin{tikzpicture}
\pgfplotsset{
/pgfplots/bar shift auto/.style={
/pgf/bar shift={
-0.5*(int(3/2*\numplotsofactualtype-1)*\pgfplotbarwidth
+ (int(3/2*\numplotsofactualtype-1))*(#1)) +
(.5+\plotnumofactualtype+int(\plotnumofactualtype/2))*\pgfplotbarwidth
+ \plotnumofactualtype*(#1)
},
},
A bar/.style={nodes near coords={\stepcounter{cheat}%
\pgfmathparse{pow(10,int((1+\number\value{cheat})/2))}%
\pgfmathprintnumber\pgfmathresult},
style={trolleygrey,fill=trolleygrey,mark=none},postaction={pattern=crosshatch
dots}},
B bar/.style={darkgray,fill=darkgray,mark=none}
}
\begin{axis}[
width = 1.2*\textwidth,
major x tick style = transparent,
ybar=2*\pgflinewidth,
bar width=0.4cm,
ymajorgrids = true,
ylabel = {Response Time (sec)},
symbolic x coords={P1,P2,P3},
xtick = data,
scaled y ticks = false,
enlarge x limits=0.35,
x tick label style={font=\Large,yshift=-10pt},
y tick label style={font=\Large},
y label style={font=\Large},
ymin=0,
legend cell align=left,
legend style={font=\Large,draw=none, legend columns=-1},
visualization depends on=y \as \rawy,
every node near coord/.append style={
anchor=north,xshift=0.2cm,
shift={(axis direction cs:P1,-\rawy)}
}
]
\addplot[A bar]
coordinates {(P1, 104.09) (P2,685.37) (P3,685.37)};
\addplot[B bar]
coordinates {(P1, 103.43) (P2,364.37) (P3,685.37)};
\addplot[A bar]
coordinates {(P1,495.74) (P2,454.20) (P3,685.37)};
\addplot[B bar]
coordinates {(P1, 364.43) (P2,364.37) (P3,685.37)};
\addplot[A bar]
coordinates {(P1,1929.74) (P2,454.20) (P3,685.37)};
\addplot[B bar]
coordinates {(P1,699.54) (P2,454.20) (P3,685.37)};
\legend{S1, S2}
\end{axis}
\end{tikzpicture}% pic 1
\end{figure*}
\end{document}
产生这样的结果：
这里的问题是 x 坐标的值。如上图所示，在 P1 中我有 10 100 10000，在 P2 中我有 10 1000 10000，在 P3 中我有 100 1000 16384。我想在这些值上添加一个固定数字，即 P1、P2、P3 中的 10 100 1000。我理解问题出在这段代码的某个地方：
A bar/.style={nodes near coords={\stepcounter{cheat}%
\pgfmathparse{pow(10,int((1+\number\value{cheat})/2))}%
\pgfmathprintnumber\pgfmathresult},
style={trolleygrey,fill=trolleygrey,mark=none},postaction={pattern=crosshatch
dots}},
B bar/.style={darkgray,fill=darkgray,mark=none}
也许在这里：\pgfmathparse{pow(10,int((1+\number\value{cheat})/2))}
但我不知道如何解决这个问题。有人知道吗？
答案1
以下是半自动化解决方案，需要手动设置类别数量（这里是 P1、P2、P3，所以是三个类别）。
它使用带有条形标签的数组（来源：在 PGFplots 中将月份名称缩写为刻度标签) 可通过计数器访问。每次绘制坐标cheat时，计数器都会增加。A bar
数据A bar是并行处理的，因此P1坐标对应于计数器值 0、1、2，坐标P2对应于 3、4、5，坐标对应于 6、7、8。因此，如果您除以类别数（此处为 3）并将结果取底，您将分别获得P3X 坐标的正确数组索引号 0、1、2 P1。P2P3
梅威瑟：
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepackage{tikz}
\pgfplotsset{compat=1.15}
\usetikzlibrary{patterns}
\newcounter{cheat}
\definecolor{trolleygrey}{rgb}{0.5, 0.5, 0.5}
\definecolor{darkgray}{rgb}{0.66, 0.66, 0.66}
\begin{document}
\def\sublabels{{"10","100","10,000"}}
\begin{figure*}[!htbp]
\begin{tikzpicture}
\pgfplotsset{
/pgfplots/bar shift auto/.style={
/pgf/bar shift={
-0.5*(int(3/2*\numplotsofactualtype-1)*\pgfplotbarwidth
+ (int(3/2*\numplotsofactualtype-1))*(#1)) +
(.5+\plotnumofactualtype+int(\plotnumofactualtype/2))*\pgfplotbarwidth
+ \plotnumofactualtype*(#1)
},
},
A bar/.style={nodes near coords={%
\pgfmathparse{\sublabels[floor(\number\value{cheat}/3)]}%
\pgfmathresult%
\stepcounter{cheat}%
},
style={trolleygrey,fill=trolleygrey,mark=none},
postaction={pattern=crosshatch dots},
},
B bar/.style={darkgray,fill=darkgray,mark=none}
}
\begin{axis}[
width = 1.2*\textwidth,
major x tick style = transparent,
ybar=2*\pgflinewidth,
bar width=0.4cm,
ymajorgrids = true,
ylabel = {Response Time (sec)},
symbolic x coords={P1,P2,P3},
xtick = data,
scaled y ticks = false,
enlarge x limits=0.35,
x tick label style={font=\Large,yshift=-10pt},
y tick label style={font=\Large},
y label style={font=\Large},
ymin=0,
legend cell align=left,
legend style={font=\Large,draw=none, legend columns=-1},
visualization depends on=y \as \rawy,
every node near coord/.append style={
anchor=north,xshift=0.2cm,
shift={(axis direction cs:P1,-\rawy)}
}
]
\addplot[A bar]
coordinates {(P1, 104.09) (P2,685.37) (P3,685.37)};
\addplot[B bar]
coordinates {(P1, 103.43) (P2,364.37) (P3,685.37)};
\addplot[A bar]
coordinates {(P1,495.74) (P2,454.20) (P3,685.37)};
\addplot[B bar]
coordinates {(P1, 364.43) (P2,364.37) (P3,685.37)};
\addplot[A bar]
coordinates {(P1,1929.74) (P2,454.20) (P3,685.37)};
\addplot[B bar]
coordinates {(P1,699.54) (P2,454.20) (P3,685.37)};
\legend{S1, S2}
\end{axis}
\end{tikzpicture}% pic 1
\end{figure*}
\end{document}
结果：
