WNL Calculation of partial areas > tlast with BQL= 0 rule [Software]

posted by ElMaestro  – Belgium?, 2018-07-13 22:25 (805 d 07:02 ago) – Posting: # 19054
Views: 4,519

Hi Babe_Ruth,

» When I set BQL to "no value," then it (blah)
»
» However, when I set BQL to 0, it uses a linear-trapezoidal rule: (Clast + 0)*(T16 - Tlast)
» Nowhere in the documentation does it say that this was the plan.

Do you mean it uses AUCpartial=0.5*(Clast + 0)*(T16 - Tlast) ?

If yes, then this is expected behaviour: Remember that you distinguish between BLQ, missing and a zero.
If you set it to zero then it means you tell WNL to believe that the value is really zero in contrast to not measured. Thus, it was quantifiable so now the last quantifiable value is no longer at t=12 but at t=16. The residual area will naturally also be zero, so the extrapolated area is zero percent. I'd say you are within expectations and specifications.

I could be wrong, but...

Best regards,
ElMaestro

R's base package has 274 reserved words and operators, along with 1761 functions. I can use 18 of them (about 14 of them properly). I believe this makes me the Donald Trump of programming.

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