Hello, I have difficulties to interpret the graph created with the parameters below (I omitted some lines, but relevant data should be there).
<http://rrd-mailinglists.937164.n2.nabble.com/file/n7582374/tempmo1.png> The graph shows - one line with high resolution data - one line with minimum values per day (step = 86400) - one line with maximum values per day (step = 86400) On the graph I do not understand, why the maximum value of the high resolution data does not correspond with the minimum / maximum values of the compressed data. On the first and second day e.g. the max values are higher than any data point of the actual high resolution data. Is this a bug? Or is there any magic I do not understand? I am using RRDtool 1.4.7 Copyright 1997-2012 by Tobias Oetiker <[email protected]> Compiled Sep 4 2012 23:43:06 on a rasbian raspberry PI. # rrdtool create temp_pool.rrd --step 900 --start "20140101 00:00" \ # DS:water:GAUGE:1200:-40:50 \ # DS:air:GAUGE:1200:-40:50 \ # DS:roof:GAUGE:1200:-40:80 \ # DS:flow:GAUGE:1200:-40:50 \ # DS:return:GAUGE:1200:-40:50 \ # DS:delta:COMPUTE:return,flow,- \ # DS:pump_flag:GAUGE:1200:0:1 \ # DS:heat_flag:GAUGE:1200:0:1 \ # DS:device:GAUGE:1200:0:90 \ # RRA:AVERAGE:0.5:1:103680 \ # RRA:MIN:0.5:96:3650 \ # RRA:MAX:0.5:96:3650 \ # RRA:AVERAGE:0.5:96:3650 graph_defs='-w 900 -h 525 -D -a PNG -T 15 --slope-mode \ DEF:water=temp_pool.rrd:water:AVERAGE \ DEF:air=temp_pool.rrd:air:AVERAGE \ DEF:delta=temp_pool.rrd:delta:AVERAGE \ DEF:heat_flag=temp_pool.rrd:heat_flag:AVERAGE \ DEF:pump_flag=temp_pool.rrd:pump_flag:AVERAGE \ DEF:roof=temp_pool.rrd:roof:AVERAGE \ DEF:roof24hmax=temp_pool.rrd:roof:MAX:step=86400 \ DEF:roof24hmin=temp_pool.rrd:roof:MIN:step=86400 \ DEF:air24hmax=temp_pool.rrd:air:MAX:step=86400 \ DEF:air24hmin=temp_pool.rrd:air:MIN:step=86400 \ CDEF:air24harea=air24hmax,air24hmin,- \ CDEF:roof24harea=roof24hmax,roof24hmin,- \ 'COMMENT:"\t\t Max Min Max Min\n" \ LINE2:roof#0000FF:"Dach norm" \ LINE2:roof24hmin#FF0000:"Dachmin" \ AREA:roof24harea#FF000020::STACK \ LINE2:roof24hmax#00FF00:"Dachmax"' Thanks for any hint!! -- View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/max-min-values-not-precise-Bug-tp7582374.html Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
