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I need a bar plot (containing multiple \addplot) with following requirements:

  1. ticks between x labels (and, in this respect, my question differs from Adjusting width of ybar interval separator to width of histogram bars),
  2. non zero space between bars of adjacent x coordinates,
  3. zero space between bars corresponding to the same x coordinate.

I could manage the requirements:

  1. by using a ybar interval plot,
  2. by using a value <1 for the ybar interval option.

as shown by the following MWE:

\documentclass{article} \usepackage{pgfplots} \usepackage{filecontents} % \pgfplotsset{compat=1.11} % \begin{filecontents}{data.txt} A B C D 0 13 9 19 1 0 1 5.5 2 0 4 4 3 1 3 14.5 4 3 8 6 5 1 8 6.5 6 2 5 5.5 7 0 7 14 8 8 14 6 9 0 5 12.5 10 0 14 17.5 \end{filecontents} % \begin{document} \begin{tikzpicture} \begin{axis}[% ybar interval=0.5,% width=\textwidth% ] \addplot table[x=A,y=B]{data.txt}; \addplot table[x=A,y=C]{data.txt}; \addplot table[x=A,y=D]{data.txt}; \end{axis} \end{tikzpicture} \end{document}

enter image description here

But I don't know how to remove the horizontal space between the bars of a same "interval". How could I achieve this?

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Here I present a solution without ybar interval. For details on how it works, please have a look at the comments in the code.

% used PGFPlots v1.14 \begin{filecontents}{data.txt} A B C D 0 13 9 19 1 0 1 5.5 2 0 4 4 3 1 3 14.5 4 3 8 6 5 1 8 6.5 6 2 5 5.5 7 0 7 14 8 8 14 6 9 0 5 12.5 10 0 14 17.5 \end{filecontents} \documentclass[border=5pt]{standalone} \usepackage{pgfplots} \begin{document} \begin{tikzpicture} \begin{axis}[ width=\textwidth, % set space between adjacent bars to zero ybar=0pt, % adjust bar width so the bars are not overlapping with the bars % of another x value % (this depends on the chosen plot `width', `xmin' and `xmax' values bar width=7pt, % to show each x value xtick distance=1, % set `xmin' and `xmax' values manually so the bars aren't clipped xmin=-0.5, xmax=10.5, % set the tick length of the `xticks' to zero ... xtick style={ % (I this key has to be prefixed by `/pgfplots`, because % normally here are just expected tikz keys) /pgfplots/major tick length=0pt, }, % but show them *between* the x values together with the grid extra x ticks={-0.5,0.5,...,10.5}, extra x tick labels=\empty, extra x tick style={ grid=major, % reset the tick length to the default value % (which otherwise would be the same as for the normal ticks % which is set to zero in this case --> see above) xtick style={ /pgfplots/major tick length=4pt, }, }, ] \addplot table [x=A,y=B] {data.txt}; \addplot table [x=A,y=C] {data.txt}; \addplot table [x=A,y=D] {data.txt}; \end{axis} \end{tikzpicture} \end{document}

image showing the result of above code

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  • Nice! But I was hoping a solution which doesn't involve manual intervention. Commented Dec 11, 2016 at 17:20
  • 1
    When you mean with "manual intervention" that bar width is automatically calculated depending on ... (this will be a long list) then I guess that there (currently, i.e. with PGFPlots v1.14) is no such feature. Commented Dec 11, 2016 at 17:24

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