Decimating Test Data

You can decimate a set of test data, which means to remove a representative subset of the data points to reduce a large data set down to a more manageable number of points.

See Also
Test Data Import Overview
About Test Data Processing
  1. From the Calibration Tools section of the action bar, click Calibration Setup .
  2. From the Test data sets section of the Calibration setup dialog box, double-click the name of the test data feature you want to edit.
  3. Click Decimate.
    The Decimate options appear above the test data plot.
  4. Optional: From the Range options, specify the range within which you want to perform decimation by doing either of the following:
    • In the Range fields, enter the minimum and maximum values of the range.
    • Drag the blue vertical lines in the chart so that they contain the range within which you want to decimate data points.

    The app determines the range by the quantity plotted along the x-axis of the chart. You can change the x-axis quantity at any time; however, doing so resets the range.

  5. In the Num points field, specify the number of points to retain within the specified range.
  6. Optional: Select Keep reversal points to retain reversal points in the decimated data set.
  7. Optional: Select Log-based decimation to decimate data points logarithmically, or clear this option to decimate data points uniformly.
  8. Click Evaluate.
    The app indicates the points to be retained after decimation by selecting the check boxes for their rows in the Data table and by coloring their points green in the plot.
    Important: Performing an evaluation always replaces the previous result.
  9. Optional: Add (or remove) points from the preview by doing either of the following:
    • Click the check box in the corresponding row of the table.
    • Right-click on a point in the chart, and choose Include/Exclude selection.
  10. Click .

    Tip: You can also cancel the decimation without making any changes by clicking .

The app removes the decimated points from the test data set and reflects the updated data set in the Test Data dialog box.