新答案

Question

我想制作一种面积图，即两个数据集之间的差异，具有对数 Y 轴刻度。可以使用“堆叠图”选项吗？在手册中提供的示例中，默认基准级别当然是 0。首先，对数模式不太好，其次，我实际上会将其中一个图设为基线。有什么想法吗？

我的目标是做出这样的事情：

\documentclass[article]{standalone}               
\usepackage{tikz,pgfplots}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
  ymin=1e-5, ymax=1e-3,
%       ymode=log,
stack plots=y,
area style,
enlarge x limits=false]
\addplot coordinates
{(1,3.121e-5) (2,2.882e-5) (3,1.469e-4) (4,3.910e-5) (5,3.910e-5)
(6,1.220e-4)}
\closedcycle;
\addplot coordinates
{(1,3.121e-5) (2,2.882e-5) (3,1.469e-4) (4,3.910e-5) (5,3.910e-5)
(6,1.220e-4)}
\closedcycle;
\end{axis}
\end{tikzpicture}
\end{document}

Answer 1

新答案

我的第一个回答太快了，即使用堆叠图时 PGFPlots 中没有错误，所以这里是我修改后的答案：

关键是要知道/记住，当使用堆叠图时，给定的命令是在反转顺序。因此，重要的是要说明\addplot fill between 前\addplot路径命名的命令。

% used PGFPlots v1.15
\documentclass[border=5pt]{standalone}
\usepackage{pgfplots}
    \usetikzlibrary{
        pgfplots.fillbetween,
    }
\begin{document}
\begin{tikzpicture}
    \begin{axis}[
        ymin=1e-5,
        ymax=1e-3,
        ymode=log,
        stack plots=y,
        enlarge x limits=false,
        no markers,
    ]
        % because when "stacked" plots is used the commands are evaluated in
        % reversed order, we need to place the `fill between' command *before*
        % the corresponding named pathes!
        \addplot [fill=green!20] fill between [of=A and B];

        \addplot+ [very thick,name path=A] coordinates {
            (1,3.121e-5) (2,2.882e-5) (3,1.469e-4)
            (4,3.910e-5) (5,3.910e-5) (6,1.220e-4)
        };
        \addplot+ [very thick,name path=B] coordinates {
            (1,3.121e-5) (2,2.882e-5) (3,1.469e-4)
            (4,3.910e-5) (5,3.910e-5) (6,1.220e-4)
        };
    \end{axis}
\end{tikzpicture}
\end{document}

---

旧答案

正如 Torbjørn T. 在在问题下方评论（通常）fillbetween图书馆将是解决你的请求的选择，但目前似乎有一个漏洞在与堆叠图一起使用时，该库中存在错误。所以我们必须找到另一种方法来解决您的问题。

我的代码注释中也解释了为什么您使用的方法\closedcycle不起作用。

% used PGFPlots v1.15
\documentclass[border=5pt]{standalone}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
    \begin{axis}[
        ymin=1e-5,
        ymax=1e-3,
        ymode=log,
        stack plots=y,
        area style,
        enlarge x limits=false,
        % so the axis lines are on the top of the "cycle" lines
        axis on top,
    ]
        \addplot coordinates {
            (1,3.121e-5) (2,2.882e-5) (3,1.469e-4)
            (4,3.910e-5) (5,3.910e-5) (6,1.220e-4)
        }
            % `\closedcycle' doesn't work here, because it would it cycles to
            % zero, which is *above* the lines here. So we have to create this
            % path by hand.
            % `current plot begin' refers to the first coordinate and because
            % we are in a logarithmic axis `/pgfplots/ymin' yields the (natural)
            % logarithmic value. (This is around -11 in this case and thus would
            % again be above the plot.) So we have to delogarithmize it.
            |- (current plot begin |- {axis cs:0,e^(\pgfkeysvalueof{/pgfplots/ymin})})
        ;
        \addplot coordinates {
            (1,3.121e-5) (2,2.882e-5) (3,1.469e-4)
            (4,3.910e-5) (5,3.910e-5) (6,1.220e-4)
        }
            |- (current plot begin |- {axis cs:0,e^(\pgfkeysvalueof{/pgfplots/ymin})})
        ;
    \end{axis}
\end{tikzpicture}
\end{document}