# shift x axis to plot daytime hours before nighttime hours

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Heidi Hirsh on 16 Aug 2020
Commented: Heidi Hirsh on 19 Aug 2020
I have a plot where the x axis is the hour of the day. Right now the xaxis starts at 0 and ends at 24. Instead, I want to plot the daytime hours before the nighttime hours so that it starts at x=8 and ends at x=7 so that I can view all the nighttime data together. Can someone tell me how to set up the plot this way?
Thank you!
This is my code right now:
f1=figure(1)
hold on; box on;
yyaxis left
yline(0)
bar(1:24,mfbin,'facecolor',gray);
errorbar(1:24,mfbin,sdfbin,'k.','linewidth',e)
ylabel('Filtered Flux (mmol/m^2/h)')
ylim([-70 70])
yyaxis right
plot(1:24,mMPARbin,'b.','markersize',30);
yline(100,'b')
% errorbar(1:24,mMPARbin,sdMPARbin,'k.','linewidth',e);
ylabel('PAR')
ylim([-1000 1000])
xlim([0 24])
set(gca,'fontsize',18)
ax=gca;
ax.YAxis(1).Color='k'
ax.YAxis(2).Color='b'

Walter Roberson on 16 Aug 2020
That only makes sense if the data is valid for 24 hours starting at 8am, not if the data is for one particular calendar day.
If the data is valid for 24 hours, then take
H = datetime('today','Format', 'HH') + hours(8:24+7);
errorbar(H, circshift(mfbin,-7), circshift(sdfbin,-7), 'k.', 'linewidth', e)
and similar.
Heidi Hirsh on 19 Aug 2020
Thank you for all your help Walter! I try setting up the tick labels like you said and I'll leave the error bars off the plot for now.