Syntax
>> BOX-COX: lambda
Parent Command
any third-level command in block > OBSERVATION
Subcommand
none
Description
This command sets parameter lambda of the Box-Cox transformation. To address a violation of the homoscedasticity assumption, the Box-Cox transformation can be applied to the measured and simulated data as follows:
Even though the data of the corresponding simulation result will be transformed, the standard deviation has to refer to the untransformed data; it will be transformed internally to calculate the appropriate weight of the residuals. The Box-Cox transformation parameter can be estimated using command >> BOX-COX.
Example
> OBSERVATION
>> PRESSURE
>>> ELEMENT : A1125
>>>> Read DATA from FILE : pres.col
>>>> standard DEVIATION : 200.0 Pa
>>>> BOX-COX : 0.1
<<<<
<<<
See Also
>> BOX-COX, >>>> LOGARITHM (o)