[rrd-users] Graphing average temperatures
Petteri Matilainen
pmatil at gmail.com
Wed Nov 21 23:01:45 CET 2007
If I'm reading your graphs correctly, you don't graph the average
temperature at all. You only display it on the 'avg.' column. I specifically
need to graph the average over 24 hrs, 1 week, 1 month and 1 year. I have
read your 'how to do this' and it has been very useful. Here's a sample
image of what I've managed to graph so far:
http://www.kotikone.fi/pmatil/out_day.png.
On the picture there is also the gap I mentioned.
The average curve is plotted the way I described it on my earlier posts.
cheers,
Petteri
On 11/21/07, Paul Rimmer <paul-rimmer at ronin-tech.com> wrote:
>
> I think I'm doing what you want and I detailed how I set everything up
> under the 'how to do this' link:
>
> http://ronin-tech.com/Content/pid=18.html
>
> Cheers,
> Paul
>
> > I also think I may be confused. So, I am measuring outside temperatures
> > every 5 minutes and updating the temperatures.rrd every
> > time. Data is simply 23.56, -1.98 etc.
> >
> > temperatures.rrd:
> >
> > rrdtool create /var/digitemp/temperature.rrd DS:out:GAUGE:600:-50:50
> > DS:in:GAUGE:600:-50:50 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:MIN:0.5:1:600
> > RRA:MIN:0.5:6:700
> > RRA:MIN:0.5:24:775 RRA:MIN:0.5:288:797 RRA:MAX:0.5:1:600 RRA:MAX:0.5
> :6:700
> > RRA:MAX:0.5:24:775 RRA:MAX:0.5:288:797
> >
> > So far graphing average values for the time period represented by each
> > pixel
> > on the graph is ok. What I want is daily, weekly, monthly and yearly
> > average
> > temperature graphs. That is, graphing the average temperature for the
> > period
> > of the graph (GPRINT:Inside:AVERAGE:"\t%6.2lf °C"). I hope this helps.
> >
> > cheers,
> >
> > Petteri
> >
> > On 11/21/07, Dan Cech <dcech at phpwerx.net> wrote:
> >>
> >> Petteri Matilainen wrote:
> >> > On 11/21/07, Simon Hobson <linux at thehobsons.co.uk> wrote:
> >> >> Petteri Matilainen wrote:
> >> >>
> >> >>> I'm currently graphing daily, weekly, monthly and yearly inside and
> >> >>> outside temperatures. The temperature values are fetched from SQL
> >> >>> database and then put into temperatures.rrd. I have a cron job that
> >> >>> runs this every 5 minutes. Then I wanted to graph average
> >> >>> temperatures too. I didn't think of any other way but to read
> >> >>> average temps from temperatures.rrd and them into a new rrd,
> >> >>> averages.rrd. Then I graph averages.rrd as usual.
> >> >
> >> >> Why don't you just graph the averages you already have in
> >> temperatures.rrd?
> >> >
> >> > How? I have
> >>
> >> On re-reading your post I think you may be confused.
> >>
> >> > DEF:Inside=/var/digitemp/temperature.rrd:in:AVERAGE
> >> > LINE1:Inside#3333CC:"Inside"
> >>
> >> This line will plot the average temperature for the time period
> >> represented by each pixel on your graph.
> >>
> >> > GPRINT:Inside:AVERAGE:"\t%6.2lf °C" <- this is the average I want to
> >> > plot which give me the "ordinary" graph. If I have
> >>
> >> This figure is a single number representing the average temperature for
> >> the period of the graph.
> >>
> >> > VDEF:avg=Inside,AVERAGE
> >> > LINE1:avg#3333CC:"Average"
> >> >
> >> > I get a straight horizontal line.
> >>
> >> This is correct. If you plot the average temperature for the graph
> >> period, you will get a line straight across, because it is the same for
> >> the entire graph period.
> >>
> >> You will probably get more useful feedback if you post some more
> details
> >> about the structure of your temperatures.rrd, the data you are
> >> inserting, and what you are trying to achieve.
> >>
> >> Dan
> >>
> >>
> > _______________________________________________
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> > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
> >
>
>
>
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