Make negative values different color

[wvr120364]

Hi,
Is it possible to create a cdef that prints a different collor in the graph if it is negative? I gathering weatherdata from accuweather in metric values and want to see when the temperature is dropping below zero. Is this possible and how?

Thanks in advance,
Wietze

[gandalf]

Hi,
Is it possible to create a cdef that prints a different collor in the graph if it is negative? I gathering weatherdata from accuweather in metric values and want to see when the temperature is dropping below zero. Is this possible and how?

Thanks in advance,
Wietze

See http://forums.cacti.net/viewtopic.php?t=8520 as a starting point
Reinhard