Re: Quantisation issues - how do i get the math right?

--===============5870212124812490167==
Content-Type: multipart/alternative; boundary=f403045db0262b4b77054a625650

--f403045db0262b4b77054a625650
Content-Type: text/plain; charset=UTF-8

I changed that and am puzzled.
how do i deal with the huge offset? In that setup, the value the device
returns is ~8000, and its a 64bit ever increasing counter...

In an other thread (
https://lists.oetiker.ch/pipermail/rrd-users/2014-September/020015.html)
that seems to deal with a similar issue,  someone recommend:

"Alternatively, you could use Absolute and reset the counter each time -
then you don't need to worry about storing the total."

I can not reset the counter in the device. Or does that person refer to
some rrdtool counter that I can reset with some clever CDEF magic?

And how will the data, which "absolute" would give me, be usable in my
case? From the documentation (
https://oss.oetiker.ch/rrdtool/tut/rrd-beginners.en.html) I understand that
I would get an slowly ascending staircase. But in what way can i use that
to emulate my incoming power? Ever increasing power from my solar panels
would be awesome, but that is not what I experienced before using rrdtool
:-)

I just got an idea that there might be some confusion about the word
"Power".

I am interested in both the engergy (Energie) and the power (Leistung)
output. Currently I am dealing with the power graph. Energy is the sum (or
integral over time) of the power. So ABSOLUTE (implemented as an ever
increasing staircase) would emulate the absorbed energy, but not the power.

--f403045db0262b4b77054a625650
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr" class=3D"gmail_msg"><br></div><div dir=3D=
"ltr" class=3D"gmail_msg">I changed that and am puzzled.=C2=A0<div class=3D=
"gmail_msg">how do i deal with the huge offset? In that setup, the value th=
e device returns is ~8000, and its a 64bit ever increasing counter...</div>=
<div class=3D"gmail_msg"><br class=3D"gmail_msg"></div><div class=3D"gmail_=
msg">In an other thread (<a href=3D"https://lists.oetiker.ch/pipermail/rrd-=
users/2014-September/020015.html" class=3D"gmail_msg" target=3D"_blank" sty=
le=3D"outline:transparent solid 1px">https://lists.oetiker.ch/pipermail/rrd=
-users/2014-September/020015.html</a>) that seems to deal with a similar is=
sue, =C2=A0someone recommend:</div><div class=3D"gmail_msg"><br class=3D"gm=
ail_msg"></div><div class=3D"gmail_msg">&quot;Alternatively, you could use =
Absolute and reset the counter each time - then you don&#39;t need to worry=
 about storing the total.&quot;=C2=A0</div><div class=3D"gmail_msg"><br cla=
ss=3D"gmail_msg"></div><div class=3D"gmail_msg">I can not reset the counter=
 in the device. Or does that person refer to some rrdtool counter that I ca=
n reset with some clever CDEF magic?</div><div class=3D"gmail_msg"><br clas=
s=3D"gmail_msg"></div><div class=3D"gmail_msg">And how will the data, which=
 &quot;absolute&quot; would give me, be usable in my case? From the documen=
tation (<a href=3D"https://oss.oetiker.ch/rrdtool/tut/rrd-beginners.en.html=
" class=3D"gmail_msg" target=3D"_blank">https://oss.oetiker.ch/rrdtool/tut/=
rrd-beginners.en.html</a>) I understand that I would get an slowly ascendin=
g staircase. But in what way can i use that to emulate my incoming power? E=
ver increasing power from my solar panels would be awesome, but that is not=
 what I experienced before using rrdtool :-)</div><br class=3D"inbox-inbox-=
Apple-interchange-newline"></div><div dir=3D"ltr" class=3D"gmail_msg">I jus=
t got an idea that there might be some confusion about the word &quot;Power=
&quot;.=C2=A0<div class=3D"gmail_msg"><br class=3D"gmail_msg"></div><div cl=
ass=3D"gmail_msg">I am interested in both the engergy (Energie) and the pow=
er (Leistung) output. Currently I am dealing with the power graph. Energy i=
s the sum (or integral over time) of the power. So ABSOLUTE (implemented as=
 an ever increasing staircase) would emulate the absorbed energy, but not t=
he power. =C2=A0</div></div><br class=3D"gmail_msg"><div class=3D"gmail_quo=
te gmail_msg"><div dir=3D"ltr" class=3D"gmail_msg"><br></div><blockquote cl=
ass=3D"gmail_quote gmail_msg" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex"><div class=3D"gmail_quote gmail_msg"><blockquote=
 class=3D"gmail_quote gmail_msg" style=3D"margin:0 0 0 .8ex;border-left:1px=
 #ccc solid;padding-left:1ex"><div class=3D"gmail_msg"><div style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:12pt;color:#000000" class=3D"gma=
il_msg"></div></div></blockquote></div></blockquote></div></div>

--f403045db0262b4b77054a625650--


--===============5870212124812490167==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
rrd-users mailing list
[email protected]
https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users

--===============5870212124812490167==--