[Tex/LaTex] Group plot: Replacing the values (labels) on x-axis

groupplotspgfplotsplottikz-pgf

I'd like to replace numerical labels (e.g., 1,2,3,4,5) on x-axis with names (e.g., A,B,C,D,E) in a group plot environment on a case-by-case basis. The group plot environment seems to easily support only a common x-axis across all group plots. How can I change the x-axis labels on the first plot to {A,B,C,D,E}, and {F,G,H,I,S} on the second plot?

I've purposefully titled my question to resemble the following post: TikZ: Replacing the values (labels) on x-axis with names

\documentclass[]{article}
    \usepackage{pgfplots, alphalph}
    \usepgfplotslibrary{groupplots}
\usepackage{filecontents}
 \begin{filecontents*}{mydata.dat}
A   B      
1   3
2   4
3   1
4   7
5   8
  \end{filecontents*}
 \begin{filecontents*}{mydata2.dat}
C   D      
1   7
2   5
3   4
4   6
5   7
\end{filecontents*}


\begin{document}

\begin{figure}
\makebox[\textwidth]{%
    \begin{tikzpicture}[font=\footnotesize\sffamily]
      \begin{groupplot}[
         group style={group size=2 by 1, vertical sep=70pt,
    ylabels at=edge left
    },
          view={0}{90},
          width=5.2cm,
          height=5.2cm,
      scale only axis,
      scaled ticks = false,
      tick label style={/pgf/number format/fixed},
      xlabel={x-axis},
      ylabel={y-axis},
          unbounded coords=jump]
        ]
        \nextgroupplot [title={\it{Title 1}}]
\addplot[black, thick, mark=o, only marks]
    table[x=A,y=B]{mydata.dat};
\addplot[black, mark=x, only marks]
    table[x=C,y=D]{mydata2.dat};

        \nextgroupplot [title={\it{Title 2}}]
\addplot[black, thick, mark=o, only marks]
    table[x=C,y=D]{mydata2.dat};
         \end{groupplot}

    \end{tikzpicture}
    }
  \end{figure}




\end{document}

enter image description here

I would like to learn how to create customized x-axis options (customized for each individual plot in group plot environment) instead of relying on common x-axis labels across the spectrum of plots in group plot.

Best Answer

You can use

        xtick={1,...,5},
        xticklabels={A,B,C,D,E}

in the options of \nextgroupplot. Change xtick={1...,5}, as you wish. Further don't use \it{...} as \it is tex command and it doesn't take an argument. Use \itshape as I did.

\documentclass[]{article}
    \usepackage{pgfplots, alphalph}
    \usepgfplotslibrary{groupplots}
\usepackage{filecontents}
 \begin{filecontents*}{mydata.dat}
A   B
1   3
2   4
3   1
4   7
5   8
  \end{filecontents*}
 \begin{filecontents*}{mydata2.dat}
C   D
1   7
2   5
3   4
4   6
5   7
\end{filecontents*}


\begin{document}

\begin{figure}
\makebox[\textwidth]{%
    \begin{tikzpicture}[font=\footnotesize\sffamily]
      \begin{groupplot}[
         group style={group size=2 by 1, vertical sep=70pt,
    ylabels at=edge left
    },
          view={0}{90},
          width=5.2cm,
          height=5.2cm,
      scale only axis,
      scaled ticks = false,
      tick label style={/pgf/number format/fixed},
      xlabel={x-axis},
      ylabel={y-axis},
          unbounded coords=jump]
        ]
        \nextgroupplot [title={\itshape Title 1},
            xtick={1,...,5},
            xticklabels={A,B,C,D,E}]
\addplot[black, thick, mark=o, only marks]
    table[x=A,y=B]{mydata.dat};
\addplot[black, mark=x, only marks]
    table[x=C,y=D]{mydata2.dat};

        \nextgroupplot [title={\itshape Title 2},
        xtick={1,...,5},
            xticklabels={F,G,H,I,S}]
\addplot[black, thick, mark=o, only marks]
    table[x=C,y=D]{mydata2.dat};
         \end{groupplot}

    \end{tikzpicture}
    }
  \end{figure}




\end{document}

enter image description here

Generally \nextgroupplot takes all options that are taken by axis environment. Hence you can customize all your x axis parameters here case by case.

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