I want to calculate the rate of change percentage, and add that as a comment/gprint at bottom of graph.
assumption: ROC = (y1 - y0) / (x1 - x0) my rrd is a gauge of disk space used in bytes. i assume all I need is to keep the first byte value (y0) and first timestamp (x0), then cdef it like this: CDEF:roc=y1,y0,-,TIME,x0-,/ but howto save first values (time = x0, bytes = y0)? this doesnt work: CDEF:y0=y0,UN,used,y0,IF CDEF:x0=x0,UN,TIME,x0,IF Howto save first values? any other suggestions for ROC calculation? thx, JurgyMan __________________________________ Do you Yahoo!? Exclusive Video Premiere - Britney Spears http://launch.yahoo.com/promos/britneyspears/ -- 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
