> I was trying to do something which I thought was fairly simple, but I > keep on getting the following error: > > "ERROR: rpn expressions without DEF or CDEF variables are not supported" > > In the most simplest form, I am trying to do the following: > > DEF:A=<rrdfile>:A:AVERAGE > DEF:B=<rrdfile>:B:AVERAGE > > VDEF:TA=A,TOTAL > VDEF:TB=B,TOTAL > > CDEF:TAB=TA,TB,ADDNAN > > So, a VDEF is a set of data and a CDEF is a single value, but a TOTAL > will be a single value?
VDEF support is currently very limited. What you are trying to do is, indeed, not possible this way. > I am trying to take two totals and add them together - seems fairly > common to want to do this? The workaround is to do your math inside a CDEF, and then find the total. CDEF:c=a,b,ADDNAN VDEF:total=c,TOTAL hth alex _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
