<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:PMingLiU;
panose-1:2 2 3 0 0 0 0 0 0 0;}
@font-face
{font-family:"MS Gothic";
panose-1:2 11 6 9 7 2 5 8 2 4;}
@font-face
{font-family:MingLiU;
panose-1:2 2 3 9 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Webdings;
panose-1:5 3 1 2 1 5 9 6 7 3;}
@font-face
{font-family:"\@MS Gothic";
panose-1:2 11 6 9 7 2 5 8 2 4;}
@font-face
{font-family:"\@MingLiU";
panose-1:2 2 3 9 0 0 0 0 0 0;}
@font-face
{font-family:"\@PMingLiU";
panose-1:2 2 3 0 0 0 0 0 0 0;}
@font-face
{font-family:"Arial Narrow";
panose-1:2 11 6 6 2 2 2 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>If you have a 0 and a 1 logged, and your graph is for one day, then you could get your total energy use by<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>DEF:onoff=myfile.rrd:myds:AVERAGE<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>(This is now a dataset of 1 or 0)<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>CDEF:powerinwatts=onoff,3000,*<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>(This is now a dataset of Watts)<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>CDEF:powertmp=powerinwatts,86400,*<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>(This is an intermediate dataset holding 86400xWatts. This is necessary because you cannot do arithmetic in a VDEF)<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>VDEF:totalenergy=powertmp,AVERAGE<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>(This is a single value of (average power over a day, multiplied by 86400). Since 86400 is the number of seconds in a day, this value is therefore the total energy consumption for the day in Joules.)<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Of course the above can be simplified. If you want in kWh rather than J you can divide by 3600000 …<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Steve<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div class=MsoNormal align=center style='text-align:center'><span lang=EN-US style='color:#1F497D'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal><b><span style='color:#1F497D'>Steve Shipway</span></b><b><span style='color:#1F497D'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>ITS Unix Services Design Lead<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>University of Auckland, New Zealand<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>Floor 1, 58 Symonds Street, Auckland<o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;color:#595959'>Phone: +64 (0)9 3737599 ext 86487<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;color:#595959'>DDI: +64 (0)9 923 6487<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;color:#595959'>Mobile: +64 (0)21 753 189<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;color:#595959'>Email: <a href="mailto:s.shipway@auckland.ac.nz"><span style='color:#595959'>s.shipway@auckland.ac.nz</span></a><o:p></o:p></span></i></p><p class=MsoNormal><span lang=EN-GB style='font-size:18.0pt;font-family:Webdings;color:green'>P</span><span lang=EN-GB style='color:blue'> </span><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:green'>Please consider the environment before printing this e-mail</span><span lang=EN-GB style='color:blue'> : </span><span lang=ZH-TW style='font-size:10.0pt;font-family:"MS Gothic";color:green'>打印本</span><span lang=ZH-TW style='font-size:10.0pt;font-family:MingLiU;color:green'>邮件，将减少一棵树存活的机会</span><span lang=EN-GB style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:navy'><o:p></o:p></span></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch [mailto:rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch] <b>On Behalf Of </b>Jan Johansson<br><b>Sent:</b> Monday, 18 November 2013 12:35 p.m.<br><b>Cc:</b> rrd-users@lists.oetiker.ch<br><b>Subject:</b> Re: [rrd-users] Calculation that is a bit over my head.<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>></span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'>I would suggest to set the DS to GAUGE<o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>></span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>></span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'>and then log 3000 when your heater is on and 0 when it is off<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>></span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=SV style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>></span><span lang=SV style='font-size:12.0pt;font-family:"Times New Roman","serif"'>cheers<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=SV style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>></span><span lang=SV style='font-size:12.0pt;font-family:"Times New Roman","serif"'>tobi<span style='color:#1F497D'><o:p></o:p></span></span></p><p class=MsoNormal><span lang=SV style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=SV style='color:#1F497D'>Hello!<o:p></o:p></span></p><p class=MsoNormal><span lang=SV style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>The DS is set to gauge, but I cannot really change the value, as the controller in use actually talks to RRD directly, so I only have control over the “read side” of things.<o:p></o:p></span></p></div></div></div></body></html>