On Fri, Feb 27, 2004 at 12:51:24AM -0800, Eric Ho wrote: > I've 2 different data sources from 2 separate RRD files. > Both heartbeats are the same, and the 'step' for both RRD files are the same. > > Is it possible to write a CDEF to compute the average of some of the > samples from these 2 data sources and then graph this average value ? > By 'some samples', I mean samples from a certain period of time > in the past. > > By looking at the manpages of 'rrdtool graph', I can't see how > this can be done via CDEF... or am I misusing CDEF or missing > the point of CDEF ?
You can't access RRD files using "CDEF". Accessing original data is done using "DEF". When you have access to the data, so when it is in a "vname" (DEF:vname=....) you can process it using "CDEF". HTH Alex -- begin sig http://www.googlism.com/index.htm?ism=alex+van+den+bogaerdt&type=1 This message was produced without any <iframe tags -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
