Support equations in EasyChart calculated pens
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WAnderson
Allow EasyChart calculated pens to accept basic equations like:
historicalPen * 9 / 5 + 32
This would allow converting a historical pen stored in degrees Celsius to Fahrenheit and other similar units of measure conversions. This in turn allows displaying a trend in different units of measure than it was recorded in rather than recording the same data twice (once in each unit of measure).
A distant second option would be to allow basing a calculated pen on another calculated pen. This would allow building the conversion in steps with each calculated pen. (Presently, calculated pens cannot be based on calculated pens, preventing this.)
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David Shay
Bumping this submission because I think it would definitely be useful. I have actually submitted another idea to go a step further and be able to leverage expressions that are available in expression tags. I expect not all expressions would translate over, but I still think it would be useful.
The other idea is at the link below if anybody wants to read it and vote for that one as well.
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lionel MAZEYRAT
some customer ask us to compare with easychart the history of the same tag value with a shift. For example the temperature chart for week N and week N-1 on the same chart. So a calculed pen History plus/minus delta time would be cool
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WAnderson
Yes! Thanks Phil. Corrected above now that we have the ability to edit posts.
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Phil Turmel
I'm gonna guess you really mean: historicalPen * 9 / 5 + 32
But yeah, this would be nice.