Cfrgtkky

The plot is working fine when axes are regular. The moment, y-axis changed to log scale it is showing only part of the plot. The dat file provided has around 9000 points. Any support will be appreciated. Thanks

documentclass{standalone}

usepackage{siunitx}

usepackage{tikz}

usepackage{pgfplots}

usepackage{verbatim}

usetikzlibrary{decorations}

usetikzlibrary{decorations.markings}

usetikzlibrary{plotmarks}

begin{document}





begin{tikzpicture}

begin{axis}[width=12cm,height=12cm,legend style={font=scriptsize,draw=none,at={(0.825,0.9)},anchor=north},

xmin=0, xmax=10000,ymin=1e-8,ymax=1e4,   xtick={

    -3.14159,-1.5708,0,

    1.5708, 3.14159},

xticklabels={

    $-pi$, $-frac{pi}{2}$,

    $0$,$frac{pi}{2}$, $pi$},ytick={1e-8,1e4},

    xlabel={Non-dimensional wave vector, $kappa$},

    ylabel={Frequency, $omega$, SI{}{radianpersecond}}, mark repeat={15},domain=-3.14:3.14, restrict y to domain = 1e-8: 1e4,

 xmin=0, xmax=10000,

ymin = 1e-8, ymax = 1e4,ymode=log,log basis y=10]

addplot [thick,color=blue] table{u_lmm.dat};  

end{axis}

end{tikzpicture}

end{document}

I agree to Kurt's commnet. Neither is you code compilable because you didn't provide (part of) your data file, nor did you show an image to illustrate what is "wrong"/not working. Thus, there is nothing we can do to help you. Your provided code works perfectly fine ...

% used PGFPlots v1.16

documentclass[border=5pt]{standalone}

usepackage{siunitx}

usepackage{tikz}

usepackage{pgfplots}

begin{document}

begin{tikzpicture}

    begin{axis}[

        width=12cm,

        height=12cm,

        xmin=0,

        xmax=10000,

        % (these `xticks` don't make much sense when `xmax=10000` ...)

        xtick={-3.14159,-1.5708,0,1.5708,3.14159},

        xticklabels={

            $-pi$, $-frac{pi}{2}$,

            $0$,$frac{pi}{2}$, $pi$

        },

        xlabel={Non-dimensional wave vector, $kappa$},

        ymode=log,

        ymin=1e-8,

        ymax=1e4,

        ytick={1e-8,1e4},

        ylabel={Frequency, $omega$, SI{}{radianpersecond}},

    ]

%        % (because you didn't provide any data ...

%        addplot [thick,color=blue] table{u_lmm.dat};

        % ... I just tested with the min and max values of the axis)

        addplot coordinates { (0,1e-8) (10000,1e4) };

    end{axis}

end{tikzpicture}

end{docum