Display Errors in Diagramms?

[cord]

how can one display an specific error of numbers in a diagramm?

I have values (measured data) and their error intervall which is not necessarily constant for every value or has the same percentage of every value.

So the "Statistic" window doesn't help me much to my knowledge.

My idea: Somehow it should (hopefully) be possible to add another row / coloumn containing the intervall and then draw these intervalls im the plot, too.
However, it is no use to draw all the errors as a separate graph.

Thanks for any help,
Peter Cordes