Horizontal line in Matlab with date on x axis -


i have piece of code in matlab need plot graph including lines depending on dates (x axis). want add horizontal line @ y=0 mimic x axis not shown due negative value.

here code:

figure1 = figure('name','historical performance'); plot(quarterend,perf(1,:),'b',quarterend,perf(2,:),'r','datetimetickformat','qqq-y','linewidth',2) xlabel('quarter'); ylabel('performance'); ax = gca; ax.xticklabelrotation=45; legend('historical performance prediction','best historical performance','location','southwest');

i have tried 

line(quarterend,[0 0],'color','g')

but not span right interval. need line displayed on interval there data points. there easy way so?


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