[Tex/LaTex] pgfplots – Number above one of the bars in the bar chart

bar chartlabelspgfplots

I want to put a number above only one of the bars in the bar chart. For example, above the bar A, I want to put a number say 200. Other bars will not have any number at the top. This is my code.

\begin{tikzpicture}
\begin{axis}[
ybar,
enlargelimits=0.15,
legend style={at={(0.5,-0.2)},
anchor=north,legend columns=-1},
title={Data=30\%},
ylabel={Values},
grid=major,
symbolic x coords={A,B,C,D},
xtick=data,
ytick={6600,6650,6700,6750,6800,6850,6900,6950},
ylabel style={font=\Large},
% nodes near coords,
% nodes near coords align={vertical},
x tick label style={rotate=45,anchor=east},
]
\addplot [MyLineStyle,draw=black,error bars/.cd,y dir=both,y explicit,error bar style={line width=1pt}] coordinates
{
(A,6898.965904)+-(20,20)
(B,6801.9847)+-(20,20)
(C,6734.0923)+-(10,10)
(D,6698.2353)+-(10,10)
};
\end{axis}
\end{tikzpicture}

I want to place a number 200 just above the bar A and leave B, C, D as they are.

Best Answer

In pgfplots you can always access the coordinates of the plot by means of axis cs; in this case, for example, you want to place a label with a number above (axis cs:A,6898.965904) plus the value of the error bar (this is something required otherwise your label will be located inside the error bar).

To place a label it is possible to exploit the usual TikZ syntax:

\node[options] at (location) {label};

thus:

\node[above] at (axis cs:A,6898.965904) {200};

but we should consider also the error bar. I suggest the use of the calc library in such a way:

\node[above] at ($(axis cs:A,6898.965904)+(0,20)$) {200};

This means that the label will be located above a position that comprises the height of the error bar.

A complete MWE:

\documentclass{article}

\usepackage{pgfplots}
\usetikzlibrary{calc}

\begin{document}

\begin{tikzpicture}
\begin{axis}[
ybar,
enlargelimits=0.15,
legend style={at={(0.5,-0.2)},
anchor=north,legend columns=-1},
title={Data=30\%},
ylabel={Values},
grid=major,
symbolic x coords={A,B,C,D},
xtick=data,
ytick={6600,6650,6700,6750,6800,6850,6900,6950},
ylabel style={font=\Large},
% nodes near coords,
% nodes near coords align={vertical},
x tick label style={rotate=45,anchor=east},
]
\addplot [draw=black,error bars/.cd,y dir=both,y explicit,error bar style={line width=1pt}] coordinates
{
(A,6898.965904)+-(20,20)
(B,6801.9847)+-(20,20)
(C,6734.0923)+-(10,10)
(D,6698.2353)+-(10,10)
};
\node[above] at ($(axis cs:A,6898.965904)+(0,20)$) {200};
\end{axis}
\end{tikzpicture}

\end{document}

The result:

enter image description here

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}

Best Answer

Related Solutions

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

[Tex/LaTex] pgfplots: percentage in matrix plot

Related Question