Value expression help483
Pages:
1Josephny private msg quote post Address this user | ||
I would like to be able to graph the total amount of propane gas used in the past 30 days. I have a stream for % of propane tank remaining (1000 gallon tank) so converting from % of tank remaining to gallons remaining is available. But I'm stuck on how to refer to a reading 30 days back to do the math (%remaining-30-days-ago minus %remaining-latest-value). Possible? Thank you! Joseph |
||
Post 1 IP flag post |
MikeMills private msg quote post Address this user | ||
Yes, possible. If you are asking to graph the daily amount Remaining this is how you can do it: - Edit the widget (click the menu button in its header) - On the first tab, select Range Type Heartbeat; View Last 30; - On the data tab, select the stream; Select Day for cycle; Select Last for the Statistic. This will cause the graph to display the ending % for each day - On the same data tab, select the stream; On the properties panel, edit eval (or Apply Expression); Enter: 1000-value*1000 or if you like algebra: 1000*(1-value) The eval assumes your percent is a decimal between zero and one. Tweak it if it is between zero and 100. Let me know if it is doing what you want. |
||
Post 2 IP flag post |
Pages:
1