Extract Log Value
Synopsis
This operator reads the specified value from the input ExampleSet and provides the value for logging.
Description
The Extract Log Value operator can be used for logging the value of the specified attribute at the specified index. The attribute name and index are specified throughattribute nameandexample indexparameters respectively. The values within an ExampleSet cannot be logged directly by the Log operator. The Extract Log Value operator makes the selected value loggable. This value can be logged by the Log operator. This value can be accessed in the Log operator at[Name of Extract Log Value operator][value][data_value]. Please study the attached Example Process for more information.
Logging and log-related operators store information into the log table. This information can be almost anything including parameter values of operators, apply-count of operators, execution time etc. The Log is mostly used when you want to see the values calculated during the execution of the process that are otherwise not visible. For example you want to see values of different parameters in all iterations of any Loop operator. For more information regarding logging please study the
Input
example set
This input port expects an ExampleSet. It is the output of the Retrieve operator in the attached Example Process. The output of other operators can also be used as input.
Output
example set
The ExampleSet that was given as input is passed without changing to the output through this port. This is usually used to reuse the same ExampleSet in further operators or to view the ExampleSet in the Results Workspace.
Parameters
Attribute name
This parameter specifies the name of the attribute whose value should be provided for logging.
Example index
This parameter specifies the index of the example whose value should be provided for logging. Please note that negative indices are counted from the end of the data set. Positive counting starts with 1, negative counting starts with -1.