Plotyy set limits y-axis but use whole axis

I use matlab R2015b and try to plot date with plotyy. When I set the limits for the plot the axis doesn't adjust to it and I cannot see all the datapoints inside the limits. I want the axis labeling to include the datapoints from the whole range inbetween the limits.

I need to change the xaxis to the date and I changed everything to include it in a latex file.

I hope someone can help me.

Thanks

if true
  % code
  function plotForSpecial(x1,y1,x2,y2,xbound,bound1,bound2,ref, tstart, tend, titlePlot, FolderName)
%plotForSpecial is a function to plot the different graphs with no need of
%writing the code often
% Input
%x1, x2 xdata as datenumb
%y1, y2 ydata
%xbound as datenumb
%bound1, bound2, ydata for boundaries 
%tstart  startdate for the plot as date
%tend    enddate for the plot as date

    reset(gca);
    reset(gcf);
    %plot
    [hAx,hLine1,hLine2]=plotyy(x1, y1, x2,y2);

    grid on;
    set(hAx(1),'YLim',[-0.2 0.2])
    set(hAx(2),'YLim',[-1 1])

    lgd = legend('Frequenzabweichung in Hz','Berechnete PRL als Faktor der angebotenen PRL');
    set(lgd, 'Interpreter', 'latex');%, 'FontSize', 8);
    %set to date
    hAx(1).FontSize = 12;
    hAx(2).FontSize = 12;
    set(hAx(1),'xtick',[datenum(tstart):((datenum(tend)-datenum(tstart))/3):datenum(tend)]) %fixed ticks to 7 per plot
    set(hAx(2),'xtick',[datenum(tstart):((datenum(tend)-datenum(tstart))/3):datenum(tend)])

    datetick(hAx(1),'x',0,'keepticks')
    datetick(hAx(2),'x',0,'keepticks')
    %set limits
    xlim(hAx(1),[datenum(tstart) datenum(tend)]);
    xlim(hAx(2),[datenum(tstart) datenum(tend)]);
    hAx(1).TickLabelInterpreter = 'latex';
    hAx(2).TickLabelInterpreter = 'latex';
    %label, title, gird
    xlabel('Zeit', 'Interpreter', 'latex', 'FontSize', 12);
    ylabel(hAx(1),'Abweichung der Netzfrequenz in Hz', 'Interpreter', 'latex', 'FontSize', 12);
    ylabel(hAx(2),'PRL', 'Interpreter', 'latex', 'FontSize', 12); 
    grid on;
    title(titlePlot, 'Interpreter', 'latex', 'FontSize', 12);
    % References
    hold(hAx(1), 'on');
    plot(xbound, bound1,'b--', xbound, bound2,'b--', xbound, ref,'r');
    %lgd = legend('Frequenzabweichung in Hz','Berechnete PRL als Faktor der angebotenen PRL', 'Totbandgrenze', 'Totbandgrenze','Referenzlinie');
    %set(lgd, 'Interpreter', 'latex');
    hold off;

    set(gcf, 'PaperPositionMode', 'auto', 'Units', 'Centimeters', 'Position', [2 2 17.4 17.4/21*12]);
    plot_name = strcat('SpecialAbruf',titlePlot);

%% Export print(gcf,fullfile(FolderName, plot_name), '-depsc')

end

end

[jonas]

Don't use the old date format, use datetime instead. It's much easier to work with.