Mean (with confidence bands) for signals sampled at different timepoints
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I have ratings from multiple subjects, which I'd like to average and display with confidence bands to show cross-subject variability, more or less like in this random plot I found in some paper (where 3 separate conditions are shown):
Once I have the mean and confidence intervals at each timepoint, I figured I could then plot those either with the ciplot Exchange function, or with something like:
fill(x,y_CI, colours, 'FaceAlpha',0.2, 'LineStyle','-');
The problem is that each of my subjects' rating curve is sampled at different time points, for instance one subject might have ratings at [0.5s, 1.1s, ..], and another at [0.2s, 0.6s, ..].
I could manually define a linspace with 100ms-or-so bins and manually compute an average + CI for each. But this seems hacky, and I'm sure a more elegant & simple way exists, although I found no built-in Matlab function for it. One answer to this question suggests using defining and synchronising timetables, but this probably doesn't work in my case as the total number of ratings differs across subjects.
Any help would be greatly appreciated!