如何绘制多个条形图，每个条形图包含多个不同的系列

Question

我想绘制一个包含多个条形图的图表，每个条形图包含不同的系列。这就是我已经拥有的。在这种情况下，Alg 1、Alg3、...、Alg 7 将是我的多个条形图，参数 1、2、3 将是我的多个系列。但在这种情况下，所有系列都有相同的名称，我希望每个条形图都有不同的名称系列。

 \documentclass[border=5mm]{standalone}
 \usepackage{pgfplots}

 \begin{document}
 \makeatletter
 \pgfplotsset{
      calculate offset/.code={
        \pgfkeys{/pgf/fpu=true,/pgf/fpu/output format=fixed}
        \pgfmathsetmacro\testmacro{(\pgfplotspointmeta           *10^\pgfplots@data@scale@trafo@EXPONENT@y)*\pgfplots@y@veclength)}
        \pgfkeys{/pgf/fpu=false}
         },
    every node near coord/.style={
        /pgfplots/calculate offset,
         yshift=-\testmacro
       },
    }
   \pgfplotstableread{
    0 1 2    4
    1 7 3    10
    2 5 2    13  
    3 11 7    2   
    4 12 8   16   
    5 7 1   2   
    }\dataset
    \begin{tikzpicture}
    \begin{axis}[ybar,
           width=17cm,
           height=10cm,
           ymin=0,
           ymax=20,        
           ylabel={Iterations},
           xtick=data,
           xticklabels = {
           Alg1,
           Alg3,
           Alg4,
           Alg5,
           Alg6,
           Alg7
           },
          xticklabel style={yshift=-13ex},
          major x tick style = {opacity=0},
          minor x tick num = 1,
          minor tick length=0ex,
          every node near coord/.append style={
                   anchor=east,
                   rotate=90
          }
          ]
  \addplot[draw=black,fill=black!20, nodes near coords=parameter1] table[x       index=0,y index=1] \dataset; 
   \addplot[draw=black,fill=black!40, nodes near coords=parameter2] table[x    index=0,y index=2] \dataset; 
   \addplot[draw=black,fill=black!60, nodes near coords=parameter3] table[x    index=0,y index=3] \dataset; 
   \end{axis}
 \end{tikzpicture}

\end{document}

我拥有的：

我想要的是：

Answer 1

这里有一个解决方案，我定义了一个\mycount限制为六个步骤并产生的计数器A,B,....,F，您也可以使用此方法按字母顺序绘制 \coordindex创建你的计数器。

计数器在内部用于nodes near coords获取所需的编号，键保存的是同伴name node的名称。 node near coords#1-\coordindex

您的代码

\documentclass[border=5mm]{standalone}
 \usepackage{pgfplots}

 \newcounter{i}
 \setcounter{i}{1}
 \def\mycount{\Alph{i}\ifnum\value{i}<6
  \stepcounter{i}
  \else
  \setcounter{i}{1}
  \fi\kern-1ex}

 \begin{document}
 \makeatletter
 \pgfplotsset{
      calculate offset/.code={
        \pgfkeys{/pgf/fpu=true,/pgf/fpu/output format=fixed}
        \pgfmathsetmacro\testmacro{(\pgfplotspointmeta           *10^\pgfplots@data@scale@trafo@EXPONENT@y)*\pgfplots@y@veclength)}
        \pgfkeys{/pgf/fpu=false}
         },
    every node near coord/.style={
        /pgfplots/calculate offset,
         yshift=-\testmacro,
       },
    name node/.style={
    every node near coord/.append style={
                   name=#1-\coordindex
                   }}
}    

   \pgfplotstableread{
    0 1 2    4   
    1 7 3    10   
    2 5 2    13  
    3 11 7    2   
    4 12 8   16   
    5 7 1   2    
    }\dataset
    \begin{tikzpicture}
    \begin{axis}[ybar,
           width=17cm,
           height=10cm,
           ymin=0,
           ymax=20,        
           ylabel={Iterations},
           xtick=data,
           xticklabels = {
           Alg1,
           Alg3,
           Alg4,
           Alg5,
           Alg6,
           Alg7
           },
          xticklabel style={yshift=-13ex},
          major x tick style = {opacity=0},
          minor x tick num = 1,
          minor tick length=0ex,
          every node near coord/.append style={
                   anchor=north,font=\scriptsize
                   }
         ]
  \addplot[draw=black,fill=black!20,name node=1,  nodes near coords=\mycount 1] table[x       index=0,y index=1] \dataset; 
  \addplot[draw=black,fill=black!40,name node=2, nodes near coords=\mycount 2] table[x    index=0,y index=2] \dataset;
  \addplot[draw=black,fill=black!60,name node=3, nodes near coords=\mycount 3] table[x    index=0,y index=3] \dataset;

   \end{axis}

   \foreach \i in{1,...,3}{
   \foreach \j in{0,1,...,5}{
   \node[anchor=east,rotate=90] at (\i-\j){parameter\kern0.5ex};}}  

 \end{tikzpicture}

\end{document}

输出