[rrd-users] How would you handle this?

[Karl Fischer]

Am 27.04.2010 20:15, schrieb Jeffrey Zhang:
> thanks, Karl.  the code is working , at least no error. but for
> some reasons, I don't see any line got drawed for the tick.
> 
> any clue?

Most likely because the value never reaches *exactly* 100 since
it's floating point - so it might be 99.99 or 100.01 etc.

You might get better results when using GT/GE/LE/LT instead of EQ

hth

- Karl


> -----Original Message-----
> From: rrd-users-bounces+xyzhang=salesforce.com at lists.oetiker.ch 
> Sent: Tuesday, April 27, 2010 11:07 AM
> To: rrd-users at lists.oetiker.ch
> Subject: Re: [rrd-users] How would you handle this?
> 
> 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