[Tex/LaTex] Add axis label to bar chart using tikz

labelstikz-pgf

I'm creating a bar chart using the following code:

\documentclass[tikz]{standalone}
\usepackage[english]{babel}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\pgfplotsset{compat=newest}

\begin{document}

\begin{tikzpicture}
\begin{axis}[
    ybar=12pt,
    ymin=0,ymax=150,
    xtick=data,
    enlarge x limits={abs=2cm},
    symbolic x coords={blond, brown},
    bar width = 20pt,
    ylabel= number, 
        ytick align=outside, 
        ytick pos=left,
        major x tick style = transparent,
        legend style={at={(0.04,0.96)},anchor=north west, font=\footnotesize, legend cell align=left,},
        ]    
    \addplot[ybar,fill=blue, area legend] coordinates {
        (blond,20)
        (brown,100)};
    \addplot[ybar,fill=purple, area legend] coordinates {
        (blond,110)
        (brown,105)}; 
 \legend{Boys, Girls}  
\end{axis}
\end{tikzpicture}

\end{document}

Hower, I would like to add a label under and in between the x-axis labels as shown in the attached figure. How can I create this label?

enter image description here

Best Answer

You just need xlabel by analogy with ylabel. The labels on the x-axis are just tick labels, like those on the y-axis. The fact that they happen to be words rather than numbers doesn't prevent you from also labelling the axis as a whole, just as you can label the y-axis ;). At least, it seems to work for me:

labelled axes

\documentclass[tikz,border=10pt]{standalone}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\pgfplotsset{compat=newest}

\begin{document}

\begin{tikzpicture}
\begin{axis}[
    ybar=12pt,
    ymin=0,ymax=150,
    xtick=data,
    enlarge x limits={abs=2cm},
    symbolic x coords={blond, brown},
    bar width = 20pt,
    ylabel= number,
    xlabel= hair colour,
        ytick align=outside,
        ytick pos=left,
        major x tick style = transparent,
        legend style={at={(0.04,0.96)},anchor=north west, font=\footnotesize, legend cell align=left,},
        ]
    \addplot[ybar,fill=blue, area legend] coordinates {
        (blond,20)
        (brown,100)};
    \addplot[ybar,fill=purple, area legend] coordinates {
        (blond,110)
        (brown,105)};
 \legend{Boys, Girls}
\end{axis}
\end{tikzpicture}

\end{document}

Related Solutions

[Tex/LaTex] pgfplots using strings from data table as x axis labels in bar chart

Instead of trying to populate the list of permitted symbolic coordinates, I would recommend to use the xticklabels from table key to set the labels. You don't need to provide an explicit ID column for this to work, you can just use x expr=\coordindex. As long as you also use xtick=data, the labels will always be assigned to the correct bars.

\documentclass{article}

\usepackage{pgfplots}
\usepackage{pgfplotstable}
\usepackage{filecontents}

\begin{filecontents}{testdata.csv}
category, value, value 2
cat a,    1,     7
cat b,    2,     6
cat c,    3,     5
cat d,    4,     4
cat e,    5,     3
cat f,    6,     2
cat g,    7,     1
\end{filecontents}

\pgfplotstableread[col sep=comma]{testdata.csv}\datatable
\makeatletter
\pgfplotsset{
    /pgfplots/flexible xticklabels from table/.code n args={3}{%
        \pgfplotstableread[#3]{#1}\coordinate@table
        \pgfplotstablegetcolumn{#2}\of{\coordinate@table}\to\pgfplots@xticklabels
        \let\pgfplots@xticklabel=\pgfplots@user@ticklabel@list@x
    }
}
\makeatother
\begin{document}

\begin{tikzpicture}
\begin{axis}[
ybar, ymin=0,
xlabel=Xstuff,
ylabel=Value,
flexible xticklabels from table={testdata.csv}{category}{col sep=comma},
xticklabel style={text height=1.5ex}, % To make sure the text labels are nicely aligned
xtick=data,
nodes near coords,
nodes near coords align={vertical}]
\addplot table[x expr=\coordindex,y=value]{\datatable};

\end{axis}

\end{tikzpicture}
\end{document}

[Tex/LaTex] How to draw bar chart using tikz

You can use PGFPlots for this. It has an xbar stacked style that uses stacked horizontal bars. Here's an example based on your image:

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


\begin{document}

\begin{tikzpicture}
\pgfplotstableread{ % Read the data into a table macro
Label   First   Second  Third
10      0.1     0.3     0.3
20      0.2     0.3     0.3
30      0.3     0.4     0.5
40      0.3     0.5     0.8
160     0.5     0.9     1.5
}\datatable

\begin{axis}[
    xbar stacked,   % Stacked horizontal bars
    xmin=0,         % Start x axis at 0
    ytick=data,     % Use as many tick labels as y coordinates
    yticklabels from table={\datatable}{Label}  % Get the labels from the Label column of the \datatable
]
\addplot [fill=yellow] table [x=First, y expr=\coordindex] {\datatable};    % Plot the "First" column against the data index
\addplot [fill=green!70!blue]table [x=Second, y expr=\coordindex] {\datatable};
\addplot [fill=red!80!yellow] table [x=Third, y expr=\coordindex] {\datatable};
\end{axis}
\end{tikzpicture}

\end{document}

Best Answer

Related Solutions

[Tex/LaTex] pgfplots using strings *from data table* as x axis labels in bar chart

[Tex/LaTex] How to draw bar chart using tikz

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[Tex/LaTex] pgfplots using strings from data table as x axis labels in bar chart