Referencing filtered array values with Expression Manager

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2 years 10 months ago - 2 years 10 months ago #111426 by duvemyster
duvemyster created the topic: Referencing filtered array values with Expression Manager
QFA is a filtered array, for which rows R1, R2, and R3 may or may not exist.

Where C1 is the first column, I'd like to utilize QFA_R1_C1, QFA_R2_C1, and QFA_R3_C1 in Expression Manager equations. However, these variable are only defined if their row is displayed.

Creating a hidden equation type question for each such value can achieve variables that are always defined whether or not their rows exist (i.e., Code: FORR3C1 | Question:{QFA_R3_C1} | and then utilize {FORR3C1} instead of {QFA_R3_C1} in subsequent EM formulas.)

But this can get to be a lot of expression type questions for larger arrays.

Question: Is there another way to ensure that {QFA_R3_C1} is always defined whether or not row R3 is filtered?
Last Edit: 2 years 10 months ago by duvemyster.

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2 years 10 months ago #111439 by tpartner
tpartner replied the topic: Referencing filtered array values with Expression Manager
Try:
{QFA_R3_C1.NAOK}

Cheers,
Tony Partner
Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.
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2 years 10 months ago #111457 by duvemyster
duvemyster replied the topic: Referencing filtered array values with Expression Manager
Awesome. Thank you. Yes, that works.

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2 years 10 months ago #111461 by tpartner
tpartner replied the topic: Referencing filtered array values with Expression Manager
No problem.

For the benefit of others, NAOK stands for "not applicable okay" and should always be used for variables from questions that may not be shown due to relevance or conditions.


.

Cheers,
Tony Partner
Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.

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2 years 10 months ago #111690 by david2013
david2013 replied the topic: Referencing filtered array values with Expression Manager
Should we always use qcode.NAOK ? Is it there any situation that we should only use qcode (no .naok)?

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2 years 10 months ago #111712 by Mazi
Mazi replied the topic: Referencing filtered array values with Expression Manager
It makes sense to always use .NAOK. I am not aware of any drawbacks.


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