5.7.6. Logarithm

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5.7.6. Logarithm

 

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Short description:

Compute the logarithm of many different Columns.

 

Long Description:

The logarithm of the selected columns is computed in the following way:

  Out= (  (C+In)>0 ? log(C+In) :  -1  )

 

…where: “In” is the input number

 “Out” is the result

 “C” is the parameter cox box.

 “x?y:z” is the classical ternary operator.

 

Transforming monetary values using a log function can sometime improve the accuracy of the continuous predictive models using these monetary values.