5.7.6. Logarithm

<< Click to Display Table of Contents >>

Navigation:  5. Detailed description of the Actions > 5.7. Data Mining >

5.7.6. Logarithm


Icon: ANATEL~3_img641

Function: logarithm

Property window:




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.