[rrd-users] AREA starting at value rather than at y=0

[Gerhard Strangar]

Joseph Mack NA3T wrote (2007-10-04 23:35):
> using rrdtool-1.0.45
> 
> I have a value with a +/- error margin . I'd like to have an 
> AREA starting at (value-error) of height 2*error to give a 
> band of color corresponding to the error limits.

What I do is:
Draw an area from 0 to maximum in grey, then draw an area from 0 to
minumum in white and then draw a line in color - no stacking at all.
(If your values can get negative, you have do little more, but it's
possible as well)

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