[Tex/LaTex] Adding lines to bar charts

bar chartpgfplotstikz-pgf

Is it possible to add a straight horizontal black line (from (0, 0.4) until the very end of the graph) in a bar chart environment like this:

Here is the code that generates this bar chart (borrowed from: Grouped bar chart)

\documentclass[12pt,a4paper,onecolumn, openright]{report}
\usepackage{xcolor}
\usepackage{pgfplots}
\usepackage{tikz}

% Define bar chart colors
%
\definecolor{bblue}{HTML}{4F81BD}
\definecolor{rred}{HTML}{C0504D}
\definecolor{ggreen}{HTML}{9BBB59}
\definecolor{ppurple}{HTML}{9F4C7C}


\begin{document}
\begin{tikzpicture}
    \begin{axis}[
        width  = 0.85*\textwidth,
        height = 8cm,
        major x tick style = transparent,
        ybar=2*\pgflinewidth,
        bar width=14pt,
        ymajorgrids = true,
        ylabel = {Run time speed},
        symbolic x coords={EgyptHD,Hover,Navi},
        xtick = data,
        scaled y ticks = false,
        enlarge x limits=0.25,
        ymin=0,
        legend cell align=left,
        legend style={
                at={(1,1.05)},
                anchor=south east,
                column sep=1ex
        }
    ]
        \addplot[style={bblue,fill=bblue,mark=none}]
            coordinates {(EgyptHD, 1.0) (Hover,1.0) (Navi,1.0)};

        \addplot[style={rred,fill=rred,mark=none}]
             coordinates {(EgyptHD,1.123) (Hover,0.85) (Navi,1.09)};

        \addplot[style={ggreen,fill=ggreen,mark=none}]
             coordinates {(EgyptHD,0.92) (Hover,0.56) (Navi,0.95)};

        \addplot[style={ppurple,fill=ppurple,mark=none}]
             coordinates {(EgyptHD,0.74) (Hover,1.07) (Navi,1.23)};

        \legend{No vectorization,TreeScore $>2$,TreeScore $>3$,TreeScore $>4$}
    \end{axis}
\end{tikzpicture}
\end{document}

Best Answer

You can use extra y ticks like

    extra y ticks = 0.4,
    extra y tick labels={},
    extra y tick style={grid=major,major grid style={thick,draw=black}}

and draw a grid. To add a legend, you can use \addlegendimage and define an image code my legend as in the following code.

\documentclass[12pt,a4paper,onecolumn, openright]{report}
\usepackage{xcolor}
\usepackage{pgfplots}

% Define bar chart colors
%
\definecolor{bblue}{HTML}{4F81BD}
\definecolor{rred}{HTML}{C0504D}
\definecolor{ggreen}{HTML}{9BBB59}
\definecolor{ppurple}{HTML}{9F4C7C}

\pgfplotsset{
/pgfplots/my legend/.style={
legend image code/.code={
\draw[thick,black](-0.05cm,0cm) -- (0.3cm,0cm);%
   }
  }
}

\begin{document}
\begin{tikzpicture}
    \begin{axis}[
        width  = 0.85*\textwidth,
        height = 8cm,
        major x tick style = transparent,
        ybar=2*\pgflinewidth,
        bar width=14pt,
        ymajorgrids = true,
        ylabel = {Run time speed},
        symbolic x coords={EgyptHD,Hover,Navi},
        xtick = data,
        scaled y ticks = false,
        enlarge x limits=0.25,
        ymin=0,
        legend cell align=left,
        legend style={
                at={(1,1.05)},
                anchor=south east,
                column sep=1ex
        },
        extra y ticks = 0.4,
        extra y tick labels={},
        extra y tick style={grid=major,major grid style={thick,draw=black}}
    ]
        \addplot[style={bblue,fill=bblue,mark=none}]
            coordinates {(EgyptHD, 1.0) (Hover,1.0) (Navi,1.0)};

        \addplot[style={rred,fill=rred,mark=none}]
             coordinates {(EgyptHD,1.123) (Hover,0.85) (Navi,1.09)};

        \addplot[style={ggreen,fill=ggreen,mark=none}]
             coordinates {(EgyptHD,0.92) (Hover,0.56) (Navi,0.95)};

        \addplot[style={ppurple,fill=ppurple,mark=none}]
             coordinates {(EgyptHD,0.74) (Hover,1.07) (Navi,1.23)};

        \legend{No vectorization,TreeScore $>2$,TreeScore $>3$,TreeScore $>4$}
        \addlegendimage{my legend}
        \addlegendentry{My line}
        %\draw (rel axis cs: 0,0.3) -- (rel axis cs: 1, 0.3);
    \end{axis}
\end{tikzpicture}
\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] Adding horizontal lines to pgfplots bar

You can compute the excess width and adjust the coordinates by 10% on each side of the drawn lines to get the lines to be 20% wider:

enter image description here

Code:

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.10}

\newcommand{\MyBarWidth}{0.6}%
\pgfmathsetmacro{\ExcessBarWitdh}{0.1*\MyBarWidth}%

\begin{document}
\begin{tikzpicture}
\begin{axis}[
  ymin=0,ymax=4,
  samples=3,
  enlarge x limits={abs=0.5},
  bar width=\MyBarWidth,
  ybar stacked,
  legend pos=south east,
    every axis/.append style={font=\footnotesize},
]

\draw[red, very thick] (axis cs:0.7-\ExcessBarWitdh,2) -- (axis cs:1.3+\ExcessBarWitdh,2);
\draw[red, very thick] (axis cs:1.7-\ExcessBarWitdh,2.5) -- (axis cs:2.3+\ExcessBarWitdh,2.5);
\draw[red, very thick] (axis cs:2.7-\ExcessBarWitdh,2.5) -- (axis cs:3.3+\ExcessBarWitdh,2.5);

\addplot
coordinates 
    {(1,1) (2,2.5) (3,1.5)};

\addplot
coordinates 
    {(1,0) (2,1) (3,0)};


\legend{low price, high price}
\end{axis}
\end{tikzpicture}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] plotting two time series with bounds

[Tex/LaTex] Adding horizontal lines to pgfplots bar

Code:

Related Question