Time Series Analysis > Building Workbook > Creating and Setting Up Calculated Series > Setting Up Calculation Method Parameters > Arithmetic > Natural Logarithm
Tool interfaces in the web application and in the desktop application are identical, and differences in functionality are given in appropiate commments.
The Natural Logarithm method calculates the natural logarithm of the series: Ln(X[t]). It is a part of a group of arithmetic methods.
NOTE. A natural logarithm can be calculated only for series values within the range (0,∞).
After the method is applied, in the workbook, based on each selected series a calculated series with a name of the Ln(<Series_Name>) type is created, containing the calculation results. For example:
See also:
Working with Calculated Series | Modeling Container: Transformations on Variables or Factors | IModelling.Ln
To apply the method
Arithmetic button on the Calculations ribbon tab.