Why are my temperatures averaging? I'm not very good with MRTG, RRDTOOL's, and the like but... I have some graphs which are recording the (internal and external) temperature at my house.
I am happy enough with the daily graphs, but I must be recording the data wrong somewhere, as the graphs for longer periods are not showing the Max or Min of the temperatures, but I suspect are averaging them out over a longer period (i think). This is naturally one of those problems of the dam computer doing what I ask it to do, rather than what I want it to do. I'm hoping it is a simple mistake, and somebody can show me the errors of my way, though I suspect I will have to lose all the data I have collected so far :( **I have made a quick webpage with this question as the web page also displays the graphs, and has a copy of the data, so people can see what my problem is... the link is... http://corporateturtles.com/tmp/200804041104/ The script I use to collect the data is listed below... # # Collect data from LabJack U3 with temp probes # let pass=0; for readline in `/home/maxwelld/.labjack/u3Feedback_h` do if [ $pass = "0" ] ; then internal=$(echo "$readline 1 * p" | dc) ; fi if [ $pass = "1" ] ; then inside=$(echo "$readline 1 * p" | dc ); fi if [ $pass = "2" ] ; then outside=$(echo "$readline 1 * p" | dc); fi let pass=pass+1 done #/usr/bin/rrdtool update /var/www/rrdtool/temp.rrd N:$internal:$inside:$outside /usr/bin/rrdtool update /var/www/rrdtool/temperature.rrd N:$internal:$inside:$outside The script I use to make the graphs is... # # Graph for temperature, Dalmore, Dunedin # -- DAY # rrdtool graph /var/www/rrdtool/temperature-day.png \ DEF:in1=/var/www/rrdtool/temperature.rrd:internal:AVERAGE \ DEF:in2=/var/www/rrdtool/temperature.rrd:inside:AVERAGE \ DEF:out=/var/www/rrdtool/temperature.rrd:outside:AVERAGE \ VDEF:MaxIn1=in1,MAXIMUM \ VDEF:MinIn1=in1,MINIMUM \ VDEF:AvgIn1=in1,AVERAGE \ VDEF:CurrentIn1=in1,LAST \ VDEF:MaxIn2=in2,MAXIMUM \ VDEF:MinIn2=in2,MINIMUM \ VDEF:AvgIn2=in2,AVERAGE \ VDEF:CurrentIn2=in2,LAST \ VDEF:MaxOut=out,MAXIMUM \ VDEF:MinOut=out,MINIMUM \ VDEF:AvgOut=out,AVERAGE \ VDEF:CurrentOut=out,LAST \ COMMENT:"\t\t\tMax\t\t\t\t Min\t\t\t\t\t Average\t\t\t\t\tCurrent\n" \ AREA:in2#00FF00:"Inside" \ GPRINT:MaxIn2:"%8.2lf deg C" \ GPRINT:MinIn2:"\t\t%7.2lf deg C" \ GPRINT:AvgIn2:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentIn2:"\t\t\t%8.2lf deg C\n" \ LINE1:out#FF0000:"Outside" \ GPRINT:MaxOut:"%7.2lf deg C" \ GPRINT:MinOut:"\t\t%7.2lf deg C" \ GPRINT:AvgOut:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentOut:"\t\t\t%8.2lf deg C\n" \ --title "Temperature, Dalmore, Dunedin, New Zealand 9010" \ --base 1000 -r -X 0 \ -s -48h -w 790 -l 0 # # Graph for temperature, Dalmore, Dunedin # -- WEEK # rrdtool graph /var/www/rrdtool/temperature-week.png \ DEF:in1=/var/www/rrdtool/temperature.rrd:internal:AVERAGE \ DEF:in2=/var/www/rrdtool/temperature.rrd:inside:AVERAGE \ DEF:out=/var/www/rrdtool/temperature.rrd:outside:AVERAGE \ VDEF:MaxIn1=in1,MAXIMUM \ VDEF:MinIn1=in1,MINIMUM \ VDEF:AvgIn1=in1,AVERAGE \ VDEF:CurrentIn1=in1,LAST \ VDEF:MaxIn2=in2,MAXIMUM \ VDEF:MinIn2=in2,MINIMUM \ VDEF:AvgIn2=in2,AVERAGE \ VDEF:CurrentIn2=in2,LAST \ VDEF:MaxOut=out,MAXIMUM \ VDEF:MinOut=out,MINIMUM \ VDEF:AvgOut=out,AVERAGE \ VDEF:CurrentOut=out,LAST \ COMMENT:"\t\t\tMax\t\t\t\t Min\t\t\t\t\t Average\t\t\t\tCurrent\n" \ AREA:in2#00FF00:"Inside" \ GPRINT:MaxIn2:"%8.2lf deg C" \ GPRINT:MinIn2:"\t\t%7.2lf deg C" \ GPRINT:AvgIn2:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentIn2:"\t\t%8.2lf deg C\n" \ LINE1:out#FF0000:"Outside" \ GPRINT:MaxOut:"%7.2lf deg C" \ GPRINT:MinOut:"\t\t%7.2lf deg C" \ GPRINT:AvgOut:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentOut:"\t\t%8.2lf deg C\n" \ --title "Temperature, Dalmore, Dunedin, New Zealand 9010" \ --base 1000 -r -X 0 \ -s -168h -w 790 -l 0 --lazy # # Graph for temperature, Dalmore, Dunedin # -- MONTH # rrdtool graph /var/www/rrdtool/temperature-month.png \ DEF:in1=/var/www/rrdtool/temperature.rrd:internal:AVERAGE \ DEF:in2=/var/www/rrdtool/temperature.rrd:inside:AVERAGE \ DEF:out=/var/www/rrdtool/temperature.rrd:outside:AVERAGE \ VDEF:MaxIn1=in1,MAXIMUM \ VDEF:MinIn1=in1,MINIMUM \ VDEF:AvgIn1=in1,AVERAGE \ VDEF:CurrentIn1=in1,LAST \ VDEF:MaxIn2=in2,MAXIMUM \ VDEF:MinIn2=in2,MINIMUM \ VDEF:AvgIn2=in2,AVERAGE \ VDEF:CurrentIn2=in2,LAST \ VDEF:MaxOut=out,MAXIMUM \ VDEF:MinOut=out,MINIMUM \ VDEF:AvgOut=out,AVERAGE \ VDEF:CurrentOut=out,LAST \ COMMENT:"\t\t\tMax\t\t\t\t Min\t\t\t\t\t Average\t\t\t\tCurrent\n" \ AREA:in2#00FF00:"Inside" \ GPRINT:MaxIn2:"%8.2lf deg C" \ GPRINT:MinIn2:"\t\t%7.2lf deg C" \ GPRINT:AvgIn2:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentIn2:"\t\t%8.2lf deg C\n" \ LINE1:out#FF0000:"Outside" \ GPRINT:MaxOut:"%7.2lf deg C" \ GPRINT:MinOut:"\t\t%7.2lf deg C" \ GPRINT:AvgOut:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentOut:"\t\t%8.2lf deg C\n" \ --title "Temperature, Dalmore, Dunedin, New Zealand 9010" \ --base 1000 -r -X 0 \ -s -730h -w 790 -l 0 --lazy # # Graph for temperature, Dalmore, Dunedin # -- YEAR # rrdtool graph /var/www/rrdtool/temperature-year.png \ DEF:in1=/var/www/rrdtool/temperature.rrd:internal:AVERAGE \ DEF:in2=/var/www/rrdtool/temperature.rrd:inside:AVERAGE \ DEF:out=/var/www/rrdtool/temperature.rrd:outside:AVERAGE \ VDEF:MaxIn1=in1,MAXIMUM \ VDEF:MinIn1=in1,MINIMUM \ VDEF:AvgIn1=in1,AVERAGE \ VDEF:CurrentIn1=in1,LAST \ VDEF:MaxIn2=in2,MAXIMUM \ VDEF:MinIn2=in2,MINIMUM \ VDEF:AvgIn2=in2,AVERAGE \ VDEF:CurrentIn2=in2,LAST \ VDEF:MaxOut=out,MAXIMUM \ VDEF:MinOut=out,MINIMUM \ VDEF:AvgOut=out,AVERAGE \ VDEF:CurrentOut=out,LAST \ COMMENT:"\t\t\tMax\t\t\t\t Min\t\t\t\t\t Average\t\t\t\tCurrent\n" \ AREA:in2#00FF00:"Inside" \ GPRINT:MaxIn2:"%8.2lf deg C" \ GPRINT:MinIn2:"\t\t%7.2lf deg C" \ GPRINT:AvgIn2:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentIn2:"\t\t%8.2lf deg C\n" \ LINE1:out#FF0000:"Outside" \ GPRINT:MaxOut:"%7.2lf deg C" \ GPRINT:MinOut:"\t\t%7.2lf deg C" \ GPRINT:AvgOut:"\t\t\t%8.2lf deg C" \ GPRINT:CurrentOut:"\t\t%8.2lf deg C\n" \ --title "Temperature, Dalmore, Dunedin, New Zealand 9010" \ --base 1000 -r -X 0 \ -s -8760h -w 790 -l 0 --lazy The command I used to create the rrd file initially was (i think)... rrdtool create temperature.rrd DS:internal:GAUGE:864:U:U \ DS:inside:GAUGE:864:U:U \ DS:outside:GAUGE:864:U:U \ RRA:AVERAGE:0.5:1:600 \ RRA:AVERAGE:0.5:6:700 \ RRA:AVERAGE:0.5:24:775 \ RRA:AVERAGE:0.5:288:797 \ RRA:MAX:0.5:1:600 \ RRA:MAX:0.5:6:700 \ RRA:MAX:0.5:24:775\ RRA:MAX:0.5:228:797\ RRA:MIN:0.5:1:600 \ RRA:MIN:0.5:6:700 \ RRA:MIN:0.5:24:775\ RRA:MIN:0.5:228:797\ RRA:LAST:0.5:1:2 If you can help me, tell me my errors, etc, that would really be great. Cheers Max Dunedin, New Zealand. _______________________________________________ mrtg mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/mrtg
