Adding 'Computed Parameters' to data

Adding 'Computed Parameters' to data

Adding 'Computed Parameters' to data:

A computed parameter is a StellarAi-generated data column, derived by applying mathematical expressions, logical operators, or trigonometric functions on data columns from the test files.

Example: Calculation of Instantaneous Distance travelled based on Speed values from the test files.

This also gives users the ability to derive a computed column from already derived computed parameters created by users of same project. Each computed parameter can be analyzed in exactly the same way as other test file parameters.


Note: User needs to be assigned a ‘Compute’ license in order to use the above two features.

Creating Computed Parameters:

1. In the left pane, click Data Analysis () icon.

2. From the Project List, select a project.

3. On the Database tab, click Computed Parameters.

4. Click Add Computed Parameter. The following pop-up will open.



5. Add the Parameter Name & Unit.

6. In the Expression field, add the computation to be performed. Users can also choose from a list of pre-defined computations under Examples.

7.Enter Description (Optional)

8.Click on Add Button

StellarAi provides pre-built set of expressions for User reference. Refer to the ‘Examples’ section of the above image.



Note: For help on the list of functions supported, and the corresponding syntax, refer to Annexure A of this document.

9. The following screen shows the mathematical expression used to derive the computed parameter, and the test files relevant to this parameter.


Note: All computed parameters are added a prefix ‘dtcp’ by default; to distinguish them from the measured parameters contained by the test file.

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