Dtyjlui

I have this bar graph, and I want to do 3 things:

1. Remove the numbers in the bars, they are overlapping (If possible keep only one, symbolizing that both bars have the same value);


2. Within the frame of the legend, enter "Data Size" and then the values ​​of 10KB and 20KB;


3. Change the y-axis value to 28

The code I'm using:

begin{tikzpicture}

begin{axis}[

ybar,

enlargelimits=0.3,

legend  style={at={(0.5 ,-0.20)},

anchor=north,legend  columns =-1},

ylabel ={Memory Usage (KB)},

xlabel ={Transmissions},

symbolic x coords ={10,100,250},

xtick=data,

nodes  near  coords ,

nodes  near  coords  align ={vertical},

]

addplot  coordinates  {(10,25.4) (100,25.4) (250,25.4)};

addplot  coordinates  {(10,25.4) (100,25.4) (250,25.4)};

legend{10KB,20KB}

end{axis}

end{tikzpicture}

The graph I have is this:

documentclass[border = 5pt]{standalone}



usepackage{pgfplots}



begin{document}

begin{tikzpicture}

  begin{axis}[

    ymin = 0, ymax = 28,

    ybar,

    enlarge x limits=0.3,

    legend  style={at={(0.5 ,-0.20)},

    anchor=north,legend  columns =-1},

    ylabel ={Memory Usage (KB)},

    xlabel ={Transmissions},

    symbolic x coords ={10,100,250},

    xtick=data,    

    nodes  near  coords  align ={vertical},

  ]



  addlegendimage{empty legend}

  addplot[nodes  near  coords, fill = blue!30]  coordinates  {(10,25.4) (100,25.4) (250,25.4)};

  addplot  coordinates  {(10,25.4) (100,25.4) (250,25.4)};



  addlegendentry{Data Size}

  addlegendentry{100KB}

  addlegendentry{20KB}

  %legend{10KB,20KB}

  end{axis}

end{tikzpicture}

end{document}

1. Remove nodes near coords




2. Use addlegendentry{Data Size}




3. Set the limit with ymax

This is just a small addendum to caverac's nice answer that shows how one may merge two nodes near coords into one.

documentclass[tikz,border=3.14mm]{standalone}

usepackage{pgfplots}

pgfplotsset{compat=1.16}

newcounter{mynodeindex}

pgfplotsset{%based on https://tex.stackexchange.com/a/75811/121799

    step nodeindex/.code={stepcounter{mynodeindex}},

    name nodes near coords/.style={

        every node near coord/.append style={/pgfplots/step nodeindex,

            name=#1-themynodeindex,

            alias=#1-last,

        },

    },

    name nodes near coords/.default=coordnode

}



begin{document}

begin{tikzpicture}

begin{axis}[

ybar,

enlargelimits=0.3,

legend  style={at={(0.5 ,-0.20)},

anchor=north,legend  columns =-1},

ylabel ={Memory Usage (KB)},

xlabel ={Transmissions},

symbolic x coords ={10,100,250},

xtick=data,

nodes  near  coords={},

nodes  near  coords  align ={vertical},

name nodes near coords

]

addplot  coordinates  {(10,28) (100,28) (250,28)};

addplot  coordinates  {(10,28) (100,28) (250,28)};

legend{10KB,20KB}

end{axis}

pgfmathtruncatemacro{Xmax}{themynodeindex/2}

foreach X [evaluate=X as Y using {int(X+Xmax)}]  in {1,...,Xmax}

{path (coordnode-X) -- (coordnode-Y) node[midway,yshift=2pt] {28};}

end{tikzpicture}

end{document}