# MATLAB: Problem with plotting on log scale – disappearing line on plot…

loglogarithmicplottingtrendline

Hi all,
So I'm working on plotting data for x-y comparisons, along with outliers that have been removed, and a custom-generated trend line, and with the data color coded by sample concentration. This works in the below code:
f2 = figure('visible','on');    hold on    scatter(xout, yout, 25, fcolor,'filled');    hold on    scatter(outlier(:,1),outlier(:,2),25,'k','filled');    hold on    plot(xplot,yplot,'LineWidth',2);    hold on    %set(gca,'xscale','log','yscale','log')      title('Insitu v. Flask Mixing Ratio, Logarithmic');      legend('Flask vs Insitu (ppbv)', 'Outliers', 'Orthogonal Regression Line');      xlabel('Flask (ppbv)')      ylabel('Insitu (ppbv)')      hold off      saveas(f2,'test1','jpeg')
But, it fails when I un-comment line that's setting the scales as logarithmic. The data still plots, and does show the bias I'm looking for, but the regression line disappears. I've tried just about every ordered variation of hold on, off, etc and changed the order things are plotted in etc…I'm stuck.
Any suggestions for tinkering, or is this a legitimate issue with the code and or something I'm missing?
Thanks, Brendan

t = linspace(0,1,100);xplot = xplot(1) + t*(xplot(end) - xplot(1));yplot = yplot(1) + t*(yplot(end) - yplot(1));