Wesley Wyche wrote: >So, since you say an Unknown (NaN) plus some value equals Unknown again
correct >then I can't use this in this way. These values in the various >node's rrds must be merged together to represent a single snapshot >of what is happening. See my earlier post - you can handle this with a bit of RPN >Makes absolutely no sense (to me anyway). Makes complete sense - add <something unknown> to a number and the result cannot be anything other than unknown. Different users will want different things - you may want to just ignore the unknown data (see the RPN I posted earlier), others may wish for the whole lot to be unknown because that's what *their* data means. Also, note that the same applies when stacking data - if something is unknown, then anything stacked on top of it in a graph will also not be drawn. -- Simon Hobson Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed author Gladys Hobson. Novels - poetry - short stories - ideal as Christmas stocking fillers. Some available as e-books. _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users