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Ploting uncertainties

Hi there...
Is there a way to plot uncertainties in a plot.
Say you got some data:
x = {1,2,3,4}
y = {2.25,3.75,4.25,5.75}
Delta y = {0.02,0.04,0.01,0.05}
then I can plot my data as points
IDL> plot, x, y, psym=1
But is there away to get uncertainties on my data?

Thanks in advance
Martin Skou