我正在尝试调整下面的标记大小tikspicture。不幸的是，当我通过添加配置绘图时mark size=0.85，编译器会发出以下消息。
Illegal unit of measure (pt inserted) ...ark=*, mark size=0.85, draw=black, smooth]
添加pt单位mark size=0.85没有帮助。此外，指定标记颜色没有任何效果，尽管我强制将颜色设置为黑色（它将以蓝色打印出来）。以下是我mark size从代码中删除选项时的 MWE。
\documentclass[crop=true,border=2mm]{standalone}
\usepackage{pgfplots}
\usepgfplotslibrary{polar}
\usepgfplotslibrary{dateplot}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{graphicx}
\pgfplotsset{compat=1.7}
\newlength\figureheight
\newlength\figurewidth
\setlength\figureheight{4cm}
\setlength\figurewidth{4cm}
\begin{document}
\begin{tikzpicture} %[scale=1.0]
\begin{polaraxis}[%
axis on top,
width = \figurewidth,
height = \figureheight,
scale only axis,
ymin=5.e5, ymax=1.5e6,
xtick ={0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330},
xticklabels={0, $\frac{\pi}6$, $\frac{\pi}3$, $\frac{\pi}2$, $\frac{2\pi}3$, $\frac{5\pi}6$, $\pi$ , $\frac{7\pi}6$, $\frac{4\pi}3$, $\frac{3\pi}2$, $\frac{5\pi}3$, $\frac{11\pi}6$},
ytick = {5e5, 1.e6, 1.5e6},
]
\addplot table [%
col sep=comma, trim cells=true, %
x=x, y=y, %
data cs=polarrad, mark=*, draw=black, smooth]
{mydata.dat};
\end{polaraxis}
\end{tikzpicture}
\begin{tikzpicture} %[scale=1.0]
\begin{axis}[%
axis on top,
width = \figurewidth,
height = \figureheight,
scale only axis,
xmin=0, xmax=6.2832,
ymin=5.e5, ymax=1.5e6,
xlabel = {$\theta$},
ylabel = {$\Gamma_{\theta}$},
grid=major,
xtick ={0, 0.7854, 1.5708, 2.3562, 3.1416, 3.9270, 4.7124, 5.4978, 6.2832},
xticklabels={0, $\frac{\pi}4$, $\frac{\pi}2$, $\frac{3\pi}4$, $\pi$ , $\frac{5\pi}4$, $\frac{3\pi}2$, $\frac{7\pi}4$, $2\pi$},
]
\addplot table [%
col sep=comma, trim cells=true, %
x=x, y=y, %
mark=*, draw=black, smooth]%
{mydata.dat};
\end{axis}
\end{tikzpicture}
\end{document}
的内容mydata.dat如下。
# mydata
x,y
0.0000,1.1686E+06
0.0175,1.1686E+06
0.0349,1.1446E+06
0.0524,1.1165E+06
0.0698,1.1034E+06
0.0873,1.1038E+06
0.1047,1.1059E+06
0.1222,1.1317E+06
0.1396,1.1500E+06
0.1571,1.1372E+06
0.1745,1.1173E+06
0.1920,1.1218E+06
0.2094,1.1257E+06
0.2269,1.1203E+06
0.2443,1.1078E+06
0.2618,1.1043E+06
0.2793,1.1239E+06
0.2967,1.1228E+06
0.3142,1.0912E+06
0.3316,1.0909E+06
有人可以帮我调整标记的大小和颜色吗？
答案1
标记选项和绘图相关选项应提供给\addplot命令以对当前绘图产生影响
\documentclass[crop=true,border=2mm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.9}
\usepgfplotslibrary{polar}
\usepgfplotslibrary{dateplot}
\usepackage{amsmath,amssymb,amsfonts}
\newlength\figureheight
\newlength\figurewidth
\setlength\figureheight{4cm}
\setlength\figurewidth{4cm}
\pgfplotstableread[col sep=comma, trim cells=true]{
%# mydata
x,y
0.0000,1.1686E+06
0.0175,1.1686E+06
0.0349,1.1446E+06
0.0524,1.1165E+06
0.0698,1.1034E+06
0.0873,1.1038E+06
0.1047,1.1059E+06
0.1222,1.1317E+06
0.1396,1.1500E+06
0.1571,1.1372E+06
0.1745,1.1173E+06
0.1920,1.1218E+06
0.2094,1.1257E+06
0.2269,1.1203E+06
0.2443,1.1078E+06
0.2618,1.1043E+06
0.2793,1.1239E+06
0.2967,1.1228E+06
0.3142,1.0912E+06
0.3316,1.0909E+06
}\mydata
\begin{document}
\begin{tikzpicture} %[scale=1.0]
\begin{polaraxis}[%
axis on top,
width = \figurewidth,
height = \figureheight,
scale only axis,
ymin=5.e5, ymax=1.5e6,
xtick ={0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330},
xticklabels={0, $\frac{\pi}6$, $\frac{\pi}3$, $\frac{\pi}2$, $\frac{2\pi}3$, $\frac{5\pi}6$,
$\pi$ , $\frac{7\pi}6$, $\frac{4\pi}3$, $\frac{3\pi}2$, $\frac{5\pi}3$, $\frac{11\pi}6$},
ytick = {5e5, 1.e6, 1.5e6},
]
\addplot[mark=*, mark size=0.2,draw=black, smooth] table [x=x, y=y,data cs=polarrad]{\mydata};
\end{polaraxis}
\end{tikzpicture}
\begin{tikzpicture} %[scale=1.0]
\begin{axis}[%
axis on top,
width = \figurewidth,
height = \figureheight,
scale only axis,
xmin=0, xmax=6.2832,
ymin=5.e5, ymax=1.5e6,
xlabel = {$\theta$},
ylabel = {$\Gamma_{\theta}$},
grid=major,
xtick ={0, 0.7854, 1.5708, 2.3562, 3.1416, 3.9270, 4.7124, 5.4978, 6.2832},
xticklabels={0, $\frac{\pi}4$, $\frac{\pi}2$, $\frac{3\pi}4$,
$\pi$ , $\frac{5\pi}4$, $\frac{3\pi}2$, $\frac{7\pi}4$, $2\pi$},
]
\addplot [mark=*, mark size=0.2,draw=black, smooth] table [x=x, y=y] {\mydata};
\end{axis}
\end{tikzpicture}
\end{document}
