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Status Future Consideration
Product Spotfire
Categories Custom Expressions
Created by Guest
Created on Feb 8, 2023

RELATED IDEAS

Add ability to reference already created values that are defined in a custom expression

Being able to reference already created values that are defined in a custom expression. For example you might use the below custom expression code. I will create an average voltage and standard deviation voltage variables for my typical process. I will then use them to calculate a CPK.

LET TypAvgVoltage = Avg( If([Process]="Typ", [Reference Voltage])) OVER All(),

LET TypStdDevVoltage = StdDev( If([Process]="Typ",[Reference Voltage])) OVER All(),

LET SpecUpperLimit = TypAvgVoltage + 6*TypStdDevVoltage,

(StatisticalUpperLimit-Avg([Reference Voltage])) / 3*StdDev([Reference Voltage]) as [CPKU]

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