Errorbars with standard deviation
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How do I graph average bedtime in hours with a standard deviation error bar? I want the y axis to reflect times from 8pm to 6am. Also not sure how to scale x axis. The average bedtime was 1:37am and the std was 2.07.
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John Doe
2019-7-3
I have had this problem for non time data and created the below solution:
%sData Row 1 = mean
%sData Row 2 = 3.std deviations
errorbar(1:1:7,sData(1,1:1:7),sData(2,1:1:7),'LineStyle','none','Marker','x')
xlim([0 8])
xticklabels({'' 'Data1' 'Data2' 'Data3' 'Data4' 'Data5' 'Data6' 'Data7' })
xlabel('X Label')
ylabel('Y Label')
title('Example Plot')
ax = gca;
ax.YGrid = 'on'
ax.YMinorGrid = 'on'
Adam Danz
2019-7-3
How are you averaging the time and computing the std? For example, what's the average of [23:59, 12:01] ? You taking the mean of a timeseries?
"I want the y axis to reflect times"
Use a datetime axis.
"How do I graph average bedtime in hours with a standard deviation error bar"
use errorbar()
Michael Molini
2019-7-3
Peter Perkins
2019-7-8
Michael, by your description you have 21 times; if that is a datetime array, it's easy to compute the mean (as a datetime) and the std dev (as a duration). But what's not clear is how many of those series you have. You mention scaling the x axis, but nothing more. I'm guessing maybe you have multiple subjects and want to plot each subject's mean with error bars.
This might be super easy if you have a timetable with all the data together, with a variable identifying which times go with which subject. Then you could use varfun, grouping by subject, to compute vectors of by-subject means and std devs, and plot them
But I think you're gonna need to provide more details.
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