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

Joseph Mack NA3T jmack at wm7d.net
Fri Oct 5 15:59:30 CEST 2007

On Fri, 5 Oct 2007, Gerhard Strangar wrote:

> 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

I tried something like this and found the grey instrusive - 
it obliterated the striped background for one thing. As well 
if I have multiple sets of data, they can be overwritten.

Thanks though

Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!

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