That would appear to be a scatter plot with mean or median values plotted on it as well (likely using movmean or movmedian), with patch objects providing the shading between the confidence intervals (or something similar).
t = linspace(1,1000,200);
y = sin(2*pi*t*0.003) + randn(size(t))*0.5;
solidline = movmean(y, 100);
scatter(t, y, 5, 'b', 'filled')
patch([t, fliplr(t)], [(solidline-stdev) fliplr(solidline+stdev)], [1 1 1]*0.6, 'FaceAlpha',0.25, 'EdgeColor','none')