对直方图 pgfplot 进行微调

Question

考虑以下图表（下面的 MWE）：

我有一些疑问。

1. [解决了]1中场休息后为什么还有一段额外时间[10,11)？
2. [请参阅下面的编辑]如何使最后一个间隔关闭？我的意思是，我希望有[9,10]值4（我只是将其[10,11)用于计算最后一次出现的情况）。
3. [解决了]如果可能的话，我希望将值准确地写在条形图上，即对齐在中心（稍微向右移动）。

我尝试寻找一些类似的解决方案，但没有进展。

平均能量损失

\documentclass[border=1pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\usepgfplotslibrary{statistics}
\pgfplotsset{%
  compat = 1.12, % I am not sure
  major grid style = {color = blue!80, line width = .6pt},
  every axis title/.append style = {font = \bfseries},
  }

\begin{document}
\begin{tikzpicture}
\begin{axis}[
  title={Title Here},
  ybar interval,
  height = 6cm,
  width = 18cm,
  xmajorgrids = false,
  ymajorgrids = true,
  major tick length = 0pt,
  minor tick length = 0pt,
  xticklabel={%
    $ [ \pgfmathprintnumber\tick , \pgfmathprintnumber\nexttick ) $%
  },
  axis y line = left,
  axis x line = bottom, 
  every outer y axis line/.append style = {-},
  every outer x axis line/.append style = {-},
  xlabel = {faa},
  xlabel style = {at = {(.5,-.2)}, anchor = north},% I'd like bold also
  ylabel = {foo},
  every node near coord/.append style = {%
    anchor = south west,
    black,
    % I'd like bold/italic
  },
  nodes near coords,
  ymin = 0, ymax = 9,
  xmin = 0, xmax = 11.5,
]
%%
\addplot+[%
  hist={% bins = 9, data max = 10  destroy everything
    bins = 10,
    data min = 1,
    data max = 11,
  },
  fill = cyan!50,
]
table[row sep=\\, y index=0]{%
  data\\%
  1\\%
  2\\2\\%
  3\\3\\3\\%
  4\\4\\%
  5\\5\\5\\5\\5\\5\\5\\5\\%
  6\\6\\6\\6\\6\\6\\%
  7\\7\\7\\7\\%
  8\\8\\8\\%
  9\\9\\9\\
  10\\%
};
\end{axis}
\end{tikzpicture}
\end{document}

---

编辑：对于 2. 我做的这个技巧并不是非常漂亮，但它非常合适。

\node[fill=white,anchor=north,inner sep=1pt] at (11.05,-2pt) {$[9,10]$};

Answer 1

如果这个答案有用，请去这里并标记那些解决上述问题中描述的关键问题的答案。

Salim 刚刚发布的评论提供了指向您问题的重要指导的链接。在那里，的作者pgfplots写道，该额外标签的存在很可能是一个错误。不过，其他人（esdd 和 jesse）能够开发出解决方法。我在这里回收了该代码，以生成我认为您试图生成的内容，以及其他请求。

一些更改包括\pgfplotsset来自所引用问题的代码，指定ymin和ymax，更改nodes near coords为hist nodes near coords，添加font=\bfseries定义xlabel style，更改bins=10为bins=9并删除data max = 10。

通过这些我们得到：

这是代码：

\documentclass[border=1pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{pgfplots}
\usepgfplotslibrary{statistics}

%https://tex.stackexchange.com/questions/181061/pgfplots-clipping-everything-outside-a-specific-area
\newcommand*\NNC{\pgfmathprintnumber{\pgfkeysvalueof{/data point/y}}}
\newcommand*\enlargexlimits{.1} % default value for enlarge x limits 
\pgfplotsset{%
    compat=newest,
    hist nodes near coords/.style={%
    nodes near coords*/.add code={}{\tikzset{every node/.append style={xshift={
                    (\pgfkeysvalueof{/pgfplots/width}-45pt) % every plot is 45pt smaller then the width
                    /(1+2*\enlargexlimits) % correction for enlarge x limits
                    /\pgfkeysvalueof{/pgfplots/hist/bins} % number of bins
                    /2% shift only half of bin width
                }}}},
                nodes near coords={% 
                    \pgfmathparse{
                        \pgfkeysvalueof{/data point/x}<#1*\pgfkeysvalueof{/pgfplots/hist/data max}?%
                        "\noexpand\NNC"%  if true print nodes near coords
                        :% if false suppress the additional node near coords
                    }\pgfmathresult%
                }},
                hist nodes near coords/.default={1}% if you set data max explicitly it will be 1
            }

\begin{document}

\begin{tikzpicture}
\begin{axis}[
  title={Title Here},
  ybar interval,
  ymin=0,
  ymax=10,
  height = 6cm,
  width = 18cm,
  enlarge x limits=\enlargexlimits, %<-- setup for label alignment
  xmajorgrids = false,
  ymajorgrids = true,
  major tick length = 0pt,
  minor tick length = 0pt,
  xticklabel={(\pgfmathprintnumber\tick--\pgfmathprintnumber\nexttick)},
  axis y line = left,
  axis x line = bottom, 
  x tick label as interval,
  every outer y axis line/.append style = {-},
  every outer x axis line/.append style = {-},
  xlabel = {faa},
  xlabel style = {at = {(.5,-.2)}, anchor = north,font=\bfseries}, % <-- font=\bfseries
  ylabel = {foo},
  ylabel style = {font=\bfseries}
]
%%
\addplot+[%
  hist={% 
    bins = 9, <-- changed 10 to 9
    data min = 1,
%    data max = 10, % <-- remove
  },
  fill = cyan!50,
  hist nodes near coords % <-- new
]
table[row sep=\\, y index=0]{%
  data\\
  1\\
  2\\2\\
  3\\3\\3\\
  4\\4\\
  5\\5\\5\\5\\5\\5\\5\\5\\
  6\\6\\6\\6\\6\\6\\
  7\\7\\7\\7\\
  8\\8\\8\\
  9\\9\\9\\
  10\\
};
\end{axis}
\end{tikzpicture}
\end{document}