[Tex/LaTex] How to fill the mark in pgfplot legend

legendpgfplots

I would like to create a graph using pgfplots. I don't like the legend symbol used for ybars and decided to go with a line legend entry and squares instead. How can I fill these marks, so that they have the same color as my bars?

Thanks

\documentclass{article}
\usepackage{caption}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\usepackage{tikz}

\begin{document}
\begin{figure}
\begin{tikzpicture}
\begin{axis}
[ybar,
xtick=data,
width=6cm,
height=5cm,
ymin=0,
ymax=0.7,
xmin=0.5,
xmax=6.5,
axis y line=left,
axis x line*=bottom,
xtick= {1,2,3,4,5,6},
bar width=4pt,
ytick={0,.1,.2,...,.7}
]
\addlegendimage{line legend,only marks,mark = square,color = black, fill =white}
\addlegendimage{line legend,only marks,mark = square,color = black, fill =gray}
\addlegendimage{line legend,only marks,mark = square,color = black, fill =black}
\addplot[xshift = 6pt,legend image post style={xshift=-6pt},color=black, fill =white, error bars, y dir=plus, y explicit]
coordinates{
(1,0.076844808) +- (1,0.043434089)  
(2,0.282802471) +-(2,0.143136578)};

\addplot[xshift = -3pt,legend image post style={xshift=3pt},color=black,fill= gray, error bars, y dir = plus, y explicit]
coordinates{
(3,0.026724427) +-(3,0.019038655)
(4,0.061169214) +-(4,0.024462018)   
(5,0.249852624) +-(5,0.047167041)   
(6,0.064414295) +-(6,0.045149736)};

\addplot[xshift = -3pt,legend image post style={xshift=3pt},color=black, fill = black, error bars, y dir=plus, y explicit]
coordinates{
(3,0.082127485) +- (3,0.045713902)          
(4,0.045611378) +- (4,0.018401772)
(5,0.299014506) +- (5,0.044026995)
(6,0.253207511) +- (6,0.320369411)
};
\legend{no, g/m, s}
\end{axis}
\end{tikzpicture}
\end{figure}
\end{document}

Best Answer

You can use the legend image code/.code key to define how to draw the legend images. In your case, you could do the following:

legend image code/.code={%
    \draw[#1] (0cm,0cm) rectangle (0.15cm,0.15cm);
}

\documentclass{article}
\usepackage{caption}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\usepackage{tikz}

\begin{document}
\begin{figure}
\begin{tikzpicture}
\begin{axis}
[ybar,
xtick=data,
width=6cm,
height=5cm,
ymin=0,
ymax=0.7,
xmin=0.5,
xmax=6.5,
axis y line=left,
axis x line*=bottom,
xtick= {1,2,3,4,5,6},
bar width=4pt,
ytick={0,.1,.2,...,.7},
legend image code/.code={%
    \draw[#1] (0cm,0cm) rectangle (0.15cm,0.15cm);
}
]
\addplot[xshift = 6pt,legend image post style={xshift=-6pt},color=black, fill =white, error bars, y dir=plus, y explicit]
coordinates{
(1,0.076844808) +- (1,0.043434089)  
(2,0.282802471) +-(2,0.143136578)};

\addplot[xshift = -3pt,legend image post style={xshift=3pt},color=black,fill= gray, error bars, y dir = plus, y explicit]
coordinates{
(3,0.026724427) +-(3,0.019038655)
(4,0.061169214) +-(4,0.024462018)   
(5,0.249852624) +-(5,0.047167041)   
(6,0.064414295) +-(6,0.045149736)};

\addplot[xshift = -3pt,legend image post style={xshift=3pt},color=black, fill = black, error bars, y dir=plus, y explicit]
coordinates{
(3,0.082127485) +- (3,0.045713902)          
(4,0.045611378) +- (4,0.018401772)
(5,0.299014506) +- (5,0.044026995)
(6,0.253207511) +- (6,0.320369411)
};
\legend{no, g/m, s}
\end{axis}
\end{tikzpicture}
\end{figure}
\end{document}

Related Solutions

[Tex/LaTex] plotting two time series with bounds

This happens because PGFPlots only uses one "stack" per axis: You're stacking the second confidence interval on top of the first. The easiest way to fix this is probably to use the approach described in "Is there an easy way of using line thickness as error indicator in a plot?": After plotting the first confidence interval, stack the upper bound on top again, using stack dir=minus. That way, the stack will be reset to zero, and you can draw the second confidence interval in the same fashion as the first:

\documentclass{standalone}
\usepackage{pgfplots, tikz}

\usepackage{pgfplotstable}

\pgfplotstableread{
temps   y_h y_h__inf    y_h__sup    y_f y_f__inf    y_f__sup    

1   0.237340    0.135170    0.339511    0.237653    0.135482    0.339823    
2   0.561320    0.422007    0.700633    0.165871    0.026558    0.305184    
3   0.694760    0.534205    0.855314    0.074856    -0.085698   0.235411    
4   0.728306    0.560179    0.896432    0.003361    -0.164765   0.171487    
5   0.711710    0.544944    0.878477    -0.044582   -0.211349   0.122184    
6   0.671241    0.511191    0.831291    -0.073347   -0.233397   0.086703    
7   0.621177    0.471219    0.771135    -0.088418   -0.238376   0.061540    
8   0.569354    0.431826    0.706882    -0.094382   -0.231910   0.043146    
9   0.519973    0.396571    0.643376    -0.094619   -0.218022   0.028783    
10  0.475121    0.366990    0.583251    -0.091467   -0.199598   0.016664    
}{\table}

\begin{document}
\begin{tikzpicture}

    \begin{axis}
    % y_h confidence interval
    \addplot [stack plots=y, fill=none, draw=none, forget plot]   table [x=temps, y=y_h__inf]   {\table} \closedcycle;
    \addplot [stack plots=y, fill=gray!50, opacity=0.4, draw opacity=0, area legend]   table [x=temps, y expr=\thisrow{y_h__sup}-\thisrow{y_h__inf}]   {\table} \closedcycle;
    % subtract the upper bound so our stack is back at zero
    \addplot [stack plots=y, stack dir=minus, forget plot, draw=none] table [x=temps, y=y_h__sup] {\table};

    % y_f confidence interval
    \addplot [stack plots=y, fill=none, draw=none, forget plot]   table [x=temps, y=y_f__inf]   {\table} \closedcycle;
    \addplot [stack plots=y, fill=gray!50, opacity=0.4, draw opacity=0, area legend]   table [x=temps, y expr=\thisrow{y_f__sup}-\thisrow{y_f__inf}]   {\table} \closedcycle;

    % the line plots (y_h and y_f)    
    \addplot [stack plots=false, very thick,smooth,blue]  table [x=temps, y=y_h]   {\table};
    \addplot [stack plots=false, very thick,smooth,blue]  table [x=temps, y=y_f]   {\table};
    \end{axis}

\end{tikzpicture}
\end{document}

[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}

Best Answer

Related Solutions

[Tex/LaTex] plotting two time series with bounds

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

Related Question