Why won't the ploy function in PI Analytics recognize attributes defined as double data type as valid values? If I type the numbers in the poly function it works fine.

Why won't the ploy function in PI Analytics recognize attributes defined as double data type as valid values? If I type the numbers in the poly function it works fine.

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That indeed seems to be a severe, but also unnessecary limitation of the Poly function. I've created a feedback item here: PI Server: Top (672 ideas) – User Feedback for OSIsoft Products

As a workaround you can use the Pow function and then write down the polynomial using multiple Pow functions.

I can confirm Poly function only accepts constants. Thanks for creating the feedback request Roger Palmen !

Thanks,

Seb

That indeed seems to be a severe, but also unnessecary limitation of the Poly function. I've created a feedback item here: PI Server: Top (672 ideas) – User Feedback for OSIsoft Products

As a workaround you can use the Pow function and then write down the polynomial using multiple Pow functions.