#### Remove Outliers / Standard Deviation Multiple

For a best fit (BF) or best fit recompensate (BFRE) line you can choose to remove outliers based on the distance from the best fit feature. This allows the removal of anomalies that arise in the measurement process.

PC-DMIS first fits a line to the data, and then determines which points are outliers based on the value in the Standard Deviation M ultiple box. It then does the following:

- Recalculates the best fit line with those outliers removed.

- Checks for outliers again.

- Recalculates the best fit line.

- Continues repeating this process until no more outliers exist or until PC-DMIS cannot compute the line (PC-DMIS can't compute the line if there are fewer than 3 data points).

For 2D lines, the deviation is calculated in a plane parallel to the workplane.

For 3D lines, the deviation is computed as the distance from the measured point to the nearest point along the line.