[rrd-users] accessing vdef from another vdef

[duanew]

oetiker wrote:
> 
> Hi Duanew,
> 
> Yesterday duanew wrote:
> [...]
>> but then I want to work out a ratio to adjust a, b and c by:
>> >
>> VDEF:ratio=maxtotal,maxtime,/
>> >
>> but it says "variable 'maxtotal' not DEF nor CDEF in VDEF 'ratio' ".
> 
> VDEF can not do all the calculations CDEF can for now. So you have
> to use CDEF for this.
> 
> CDEF:ratio_pre=total,POP,maxtotal,maxtime,/
> 
>> Is this just not supported?  Is there some other way I can do it?
>> >
>> >
>> Here is the file script:
>> >
>> >  http://n2.nabble.com/file/n3383194/rrdfetch.sh rrdfetch.sh
>> >
>>
>> Sorry, I missed ths bit:
>>
>>
>> Note that currently only aggregation functions work in VDEF rpn
>> expressions.
>> Patches to change this are welcome.
>>
>>
>> I should be able to calculate and apply the ratio in the CDEF.
> 
> exactly
> tobi
> 
>>
>>
> 
> -- 
> Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
> http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900
> 
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> 
> 
http://n2.nabble.com/file/n3389291/rrdfetch.sh rrdfetch.sh 
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