Hi Jeff, Please check the (un-replyed till now) message Wed, Mar 19, 2008 at 3:17 PM
[rrd-users] Rate Of Change question<https://lists.oetiker.ch/pipermail/rrd-users/2008-March/013860.html> https://lists.oetiker.ch/pipermail/rrd-users/2008-March/013860.html hope this helps the setup. still i hope someone enlightens the ROC question. On Thu, Apr 17, 2008 at 4:31 AM, jrshenk <[EMAIL PROTECTED]> wrote: > > Hi, > > I am graphing barometric pressure, with the graph showing a two day > period. > I would like use gprint to add the rate of change over the last hour to > the > graph. I would like to take the value from 1 hour ago and subtract the > LAST > value. The trouble I am having is getting the value from 1 hour ago. > Below > is what I am trying to do: > > VDEF:last=pressure,LAST GPRINT:last:"Current=%4.2lf%s" \ > CDEF:old=pressure,LAST-1h > VDEF:ROC=old,LAST,- GPRINT:ROC:"Change=%4.2lf%s" \ > > But I am unsure how to get the value from 1 hour ago. which is what I was > hoping "CDEF:old=pressure,LAST-1h" would accomplish. > Thanks in advance for any help, > > Jeff > > > -- > View this message in context: > http://www.nabble.com/Calculating-rate-of-change-from-gauge-tp16693297p16693297.html > Sent from the RRDTool - User mailing list archive at Nabble.com. > > _______________________________________________ > rrd-users mailing list > [email protected] > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users >
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