[rrd-users] Autoscaling y-axis max and min to same absolute value

(private) HKS hks.private at gmail.com
Wed Oct 8 21:11:07 CEST 2008

Thank you, that's taken me in the right direction. When I add
"LINE:<datasource>" to my graph definition, it doesn't actually change
anything. Increasing the width (LINE1:<datasource>) draws the graph
correctly with no visible line - but for each line I drew, a black box
appears in the legend section of the graph. Is it possible to draw a
line without a legend at all?

Thanks again for the help.


On Wed, Oct 8, 2008 at 2:39 PM, Simon Hobson <linux at thehobsons.co.uk> wrote:
> Tobias Oetiker wrote:
>>  > I've got several traffic graphs that map inbound traffic to positive
>>>  y-values and outbound traffic to negative y-values. I want the y-axis
>>>  to continue autoscaling, but I would like the max and min values to
>>>  scale at the same rate. In other words, abs(min) should always equal
>>>  abs(max). Is this possible with rrdgraph?
>>you could paint outbund traffic with the background color in the
>>positive y axis and the other way round, then the graph will scale
> I had to think about that for a minute, it might not be clear to a new user.
> Just to clarify, you mean :
> Paint outbound traffic as positive using background colour
> Paint inbound traffic as positive with inbound data colour
> Paint inbound traffic as negative using background colour
> Paint outbound traffic as negative using outbound data colour
> Thus the Y axis will scale on the positive side to include the max
> value of inbound or outbound traffic, and it will scale on the
> negative side to include the min value of -ve inbound and -ve
> outbound traffic. Painting the data with the background colour
> doesn't draw anything visible, but it will cause the graph to
> autoscale to include it.
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