pgfplots: minor y ticks not showing

Question

below code does does not draw y minor ticks. I could specify them manually, but would prefer to have them drawn automatically by 'minor y tick num=1'. Also I do not understand why exactly they are not drawn in the example. Can anybody help?

\documentclass{standalone}
\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
\begin{axis}[
    grid=major,
    minor x tick num=1,
    minor y tick num=1,
    xtick={0,10,...,40},
    ytick={0,0.2,...,1},
%   minor ytick={0.1,0.3,...,0.9},
    xmin=0,
    xmax=40,
    ymin=0,
    ymax=1,
    ]
\end{axis}
\end{tikzpicture}
\end{document}

I would like to get minor y ticks at 0.1,0.3,0.5,0.7 and 0.9 without specifying manually — Milton, Mar 19 '16 at 18:37

score 2 · Accepted Answer · answered Mar 19 '16 at 19:02

Just providing the minor x tick num=1 already gives the desired result. But I have given more possibilities in the code below how you can set minor yticks. Have a look there.

% used PGFPlots v1.13
\documentclass[border=2mm]{standalone}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
        xmin=0,
        xmax=40,
        ymin=0,
        ymax=1,
        grid=major,
        xtick={0,10,...,40},
        minor x tick num=1,
        % only setting the following key gives the desired result already
        minor y tick num=1,
        % ---------------------------------------------------------------------
%        % I think giving the `ytick's as abbreviated list causes some
%        % rounding problems and that is why the `minor ytick's are not drawn
%        % ...
%        ytick={0,0.2,...,1.0},
%        % ... this is supported by the fact when giving each entry also the
%        % `ytick's are drawn correctly
%        ytick={0,0.2,0.4,0.6,0.8,1.0},
%        % a simpler method to provide an equidistant tick position is using
%        % the following key which then also works fine with the
%        % `minor y tick num' key
%        ytick distance={0.2},
%        % and as you already have found out, this should be the last option
%        % to take into consideration
%        minor ytick={0.1,0.3,...,0.9},
    ]
\end{axis}
\end{tikzpicture}
\end{document}

Dear Stefan, thank you very much for the detailed answer. I will use x/y tick distance from now on. Totally missed it in the manual. Info on rounding errors — Milton, Mar 19 '16 at 19:19
@user3795444, you are welcome. Besides accepting the answer you can also upvote it, if you are satisfied with my answer. — Stefan Pinnow, Mar 19 '16 at 19:37
@user3795444, at the rounding error: Great, that you have found an example proving it. I was just to lazy to search for it ;) — Stefan Pinnow, Mar 19 '16 at 19:38

pgfplots: minor y ticks not showing

1 Answers1