Am 27.04.2010 19:39, schrieb Jeffrey Zhang: > Hi Can anybody give me clue on - > > how can I draw a vertical line for time in X-axis which depands on > the Y-axis value, e.g, at the time of Y=100? > probably I should use VDEF but I don't know how to derive the time? > > A simple example would be great.
Hi Jeffrey, try this: CDEF:yMark=value,100,EQ,1,UNKN,IF TICK:yMark#000000:1 hth - Karl _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
