[Tex/LaTex] Symbolic Labels in pgfplots Bar Chart

bar chartpgfplots

In the following code, why do I have to type the x-axis labels explicitly in the axis options and not just use the labels from the coordinates data? Is there a way to just use the data from the coordinates? This wold be really inconvenient specially for large data sets..

\documentclass{article}
  \usepacage{pgfplots}
  \begin{document}
    \begin{center}
    \begin{tikzpicture}
      \begin{axis}[
        width=12cm,
        height=5cm,
        ybar,
        axis y line=left,
        axis x line=middle,
        enlargelimits=0.15,
        ylabel={Score/5},
        ymin = 0,
        ymax = 5,
        symbolic x coords={a,b,c,d,%
                e,f,g,h},
        xtick=data,
        nodes near coords align={vertical},
        x tick label style={rotate=90,anchor=east},
      ]
        \addplot[fill=maroon!30] coordinates {  (f2011,4.1)
                    (a,4.2) (b,4.2) (c,3.9)
                    (d,4.0) (e,4.1) (f,4.0)
                    (g,4.0) };
    \end{axis}
  \end{tikzpicture}
 \end{center}
\end{document}

Best Answer

You can do it if you read the coordinates from a table:

Code

\documentclass[tikz, border=2mm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.12}
\usepackage{pgfplotstable}
\usepackage{amsmath}

\pgfplotstableread{
sym y
a 4.2
b 4.2
c 3.9
d 4.0
e 4.1
f 4.0
g 4.0
}\mypoints

\begin{document}

\begin{tikzpicture}
    \begin{axis}
    [   axis y line=left,
        axis x line=middle,
        enlargelimits=0.15,
        ylabel={$\frac{\text{Score}}{5}$},
        ymin = 0,
        ymax = 5,
        ybar,
        xticklabels from table={\mypoints}{sym},
        xtick=data,
    ]
        \addplot[fill=red!50!black] table [x expr=\coordindex] {\mypoints};
    \end{axis}
\end{tikzpicture}

\end{document}

Output

Related Solutions

[Tex/LaTex] How to hide empty (value 0) ybars with pgfplots

You can use

 y filter/.expression={y==0 ? nan : y}

in the options of \addplot.

\documentclass{article}

% ---------------------------------- tikz
\usepackage{pgfplots}          % to print charts
\pgfplotsset{compat=1.12}

\begin{document}

\begin{figure}
  \centering
  \begin{tikzpicture}
    \begin{axis} [
      % general
      ybar,
      scale only axis,
      height=0.5\textwidth,
      width=1.2\textwidth,
      ylabel={\# Dots},
      nodes near coords,
      xlabel={Variation},
      xticklabel style={
        rotate=90,
        anchor=east,
      },
      %enlarge x limits={abs value={3}},
      ]
      \addplot+[y filter/.expression={y==0 ? nan : y}] table [
        x=grade,
        y=value,
      ] {
grade   value
-11 0
-10 0
-9  0
-8  0
-7  0
-6  0
-5  3
-4  1
-3  2
-2  15
-1  11
0   179
1   8
2   1
3   0
4   1
5   2
6   0
7   0
8   0
9   0
10  0
11  0
      };
    \end{axis}
  \end{tikzpicture}
\end{figure}
\end{document}

[Tex/LaTex] pgfplots: percentage in matrix plot

It does not work in your MWE because you are overwriting it by also giving the option nodes near coors to the \addplot command. Remove the latter one (or specify format here), and it will print. I added a thinspace before the percentage sign, although it can also be recommended to load the siunitx package and let that format and typeset the values for you.

Anyway, here's the quickfixed version:

\documentclass[border=3pt]{standalone}
\usepackage{pgfplots}
\pgfplotsset{%
  width=5cm,
  height=18cm,
  compat=1.13,
  colormap={blackwhite}{gray(0cm)=(1); gray(1cm)=(0.5)},
  xticklabels={LPIBG, ALL, HPIBG},
  xtick={0,...,2},
  ytick=\empty
}

\begin{document}
\begin{tikzpicture}
\begin{axis}[%
  enlargelimits=false,
  xlabel style={font=\footnotesize},
  ylabel style={font=\footnotesize},
  legend style={font=\footnotesize},
  xticklabel style={font=\footnotesize},
  yticklabel style={font=\footnotesize},
  colorbar,
  colorbar style={%
    ytick={0,20,40,60,80,100},
    yticklabels={0,20,40,60,80,100},
    yticklabel={\pgfmathprintnumber\tick\,\%},
    yticklabel style={font=\footnotesize}
  },
  point meta min=0,
  point meta max=100,
  nodes near coords={\pgfmathprintnumber\pgfplotspointmeta\,\%},
  every node near coord/.append style={xshift=0pt,yshift=-7pt, black, font=\footnotesize},
]

\addplot[
matrix plot,
mesh/cols=3,
point meta=explicit]
table[meta=C]{
  x y C
  0 0 80
  1 0 36
  2 0 40
  0 1 64
  1 1 80
  2 1 60
  0 2 52
  1 2 84
  2 2 72
  0 3 72
  1 3 28
  2 3 32
  0 4 56
  1 4 84
  2 4 80
  0 5 72
  1 5 52
  2 5 44
  0 6 4
  1 6 84
  2 6 41
  0 7 37
  1 7 69
  2 7 84
  0 8 63
  1 8 53
  2 8 82
  0 9 78
  1 9 74
  2 9 39
  0 10 39
  1 10 63
  2 10 88
  0 11 76
  1 11 74
  2 11 49
  0 12 39
  1 12 6
  2 12 88
  0 13 46
  1 13 33
  2 13 75
  0 14 88
  1 14 67
  2 14 54
  0 15 79
  1 15 83
  2 15 75
  0 16 50
  1 16 46
  2 16 71
  0 17 92
  1 17 71
  2 17 75
  0 18 46
  1 18 33
  2 18 8
};
\end{axis}
\end{tikzpicture}
\end{document}