透明脉冲(ycomb)与 pgfplots 重叠?

透明脉冲(ycomb)与 pgfplots 重叠?

考虑以下 MWE:

\documentclass[%
  12pt,
  journal,
  twoside,
  draftcls,
  letterpaper,
]{IEEEtran}

\usepackage{pgfplots}
\usepackage{pgfplotstable}
\usepackage{tikz}
\usetikzlibrary{intersections} %% named intersections "I do not know the key '/tikz/name path global'"


\begin{document}

\pgfplotstableread[col sep=&,row sep=\\]{
  0.0159779999812599 & 0.00398599999607541 \\
  0.0240009999834001 & 0.00802300000214018 \\
  0.0240489999996498 & 4.80000162497163e-05 \\
  0.0280280000006314 & 0.00397900000098161 \\
}\mytable


\begin{tikzpicture}

\begin{scope}
\begin{axis}[
  title={\small my data},
  title style={at={(0.5,0.9)},anchor=center},
  clip=true,
  axis x line=middle,
  axis y line=middle,
  y axis line style=-,
  xmin = 2e-3,
  xmax = 38e-3,
  ymin = 0,
  ymax = 1.5,
  xlabel={$t$\,[ms]},
  xlabel style={at={(axis description cs:1.01,+0.0)},anchor=west},
  ylabel={}, %{$U$\,[V]},
  ylabel style={at={(axis description cs:-0.02,1.01)},anchor=south},
  xtick=data,
  scaled x ticks=base 10:3,
  xtick scale label code/.code={},
  x tick label style={
    rotate=-45,
    anchor=west,
    /pgf/number format/fixed,
    /pgf/number format/fixed zerofill,
    /pgf/number format/precision=3,
  },
  ymajorticks=false,
  yminorticks=false,
  tick label style={font=\small,},
  legend cell align=left,
  legend pos=outer north east,
]

\addplot[
  name path global=afunc,
  ycomb,
  draw=black,
%   opacity=0.2, % global
  mark=*, mark options={
    draw=black,
    fill=black,
    opacity=0.2, % on mark
  },
  line width=2pt,
]
  table[x index = 0,y expr=1] \mytable ;

\end{axis}
\end{scope}

\end{tikzpicture}
\end{document}

使用原有的代码,evince将 pdf 呈现为(单击可查看完整尺寸的图像):

测试-1.png

启用“%global”不透明度后,pdf 呈现为:

测试-2.png

...但是,我想要的是“脉冲”是透明的,所以当它们重叠时它们会获得更强烈的颜色 - 并且上面的图像都没有显示这一点:全局的就是全局的 - 而应用于标记样式的“局部”的似乎被忽略了?

另外,有什么方法可以让脉冲的标记(圆圈)完全填满?(如果仔细观察全尺寸图像,看起来里面好像有一个洞)

有什么方法可以实现我想要的吗?日志文件显示:

包:pgfplots 2011/12/29 v1.5.1(git show 1.5.1-4-g53e640f)

答案1

好吧,我找到了一种可行的办法:首先,我尝试了ybar风格,它有点类似 - 但它似乎也将不透明度/透明度应用于整个图表 - 而不是单个条形图/线条。

因此,我尝试循环遍历表格数据并绘制具有不透明度的单独线条 - 最后似乎成功了;上述 MWE 中的相关变化是:

...
\usepackage{pgfplotstable}
...
]

\def\opac{0.4}

\addplot[
  name path global=afunc,
  only marks, %ycomb,
  draw=none, %black,
  %opacity=\opac, % global
  mark=*, mark options={
    draw=none, %black,
    %fill=black,
    opacity=\opac, % on mark; both stroke and fill (and stroke will overlap fill - twice the opacity!? even with draw=none?)
  },
  %line width=2pt, % also changes the line around the mark!
]
  table[x index = 0,y expr=1] \mytable ;


% \addplot[
%   name path global=afuncb,
%   ybar,
%   bar width=2pt,
%   %fill=black,
%   %draw=none,
%   opacity=0.4,
% ]
%   table[x index = 0,y expr=1] \mytable ;


\pgfplotstableforeachcolumnelement{0}\of\mytable\as\cx{%
  % \node{I have now cell element ‘\cx’ at row index ‘\pgfplotstablerow’;\par};
  \edef\temp{ %
    \noexpand\draw[%
      line width=2pt, %semithick,
      draw=black,%
      fill=none,%
      opacity=\opac,%
    ] ({axis cs:\cx,0}) -- ({axis cs:\cx,1}); %
  }
  \temp
}

\end{axis}
...

...输出为:

测试-3.png

我保留了“仅标记”样式,只是为了更容易地对叠加的颜色进行视觉比较。现在唯一困扰我的是圆形标记周围有明显的笔触,但这没什么大不了的……

相关内容