DIFFERENTIATE Operator

KPL

Hello,

I am trying to filter transients out of a numerical dataset depicting a ship’s operation. Keying off of a SPEED attribute, I used a DIFFERENTIATE operator to determine the change between SPEED(t) and SPEED(t-1) sequential records in the dataset. DIFFERENTIATE created an attribute with the name change(SPEED) with the SPEED difference between adjacent rows. Now I want to filter out records above a threshold, but the attribute name “change(SPEED)” triggers an error. Any suggestions on how I can filter this attribute created by DIFFERENTIATE?

Thanks, KPL.

Andrew2

Hello

I can't be sure because I can't see your process but It might be because your attribute name contains brackets and this is confusing the filter examples operator. Try renaming it to something like change_speed.

regards

Andrew