[rrd-users] Re: coloring graphs red when the input his a border

[David Sawyer]

Alex did a tutorial and used car speeds as an example

http://ee-staff.ethz.ch/~oetiker/webtools/rrdtool/tutorial/rrdtutorial.html

below is his code to produce what you want (maybe), it shouldn't be too hard
to change the code to match your needs.

rrdtool graph speed4.gif
      --start 920804400 --end 920808000
      --vertical-label km/h
      DEF:myspeed=test.rrd:speed:AVERAGE
      "CDEF:kmh=myspeed,3600,*"
      CDEF:fast=kmh,100,GT,100,0,IF
      CDEF:over=kmh,100,GT,kmh,100,-,0,IF
      CDEF:good=kmh,100,GT,0,kmh,IF
      HRULE:100#0000FF:"Maximum allowed"
      AREA:good#00FF00:"Good speed"
      AREA:fast#550000:"Too fast"
      STACK:over#FF0000:"Over speed"

> -----Original Message-----
> From:	Serge Maandag [SMTP:serge.maandag at staff.zeelandnet.nl]
> Sent:	Friday, April 20, 2001 2:05 PM
> To:	rrd-users at list.ee.ethz.ch
> Subject:	[rrd-users] coloring graphs  red when the input his a border
> 
> 
> question:
> 
> When graphing my data I want to define a threshold. If the value
> crosses that threshold, I want it to turn red.
> 
> Say I wanted to graph data that has a threshold of 10. I would like the
> line to be green if it's under 0 and red if it's over 10. I defined
> this:
> 
> 
> 
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