Two important parameters in scaling are location and scale. The values that the function uses for location and scale depend on the ScaleMethod argument value, as the following table shows. In the table, X represents an input column, and Xmean, minX, and maxX are the mean, minimum, and maximum values of the column X.
| ScaleMethod | Location | Scale |
|---|---|---|
| mean | X mean | 1 |
| sum | 0 | Σ X |
| ustd | 0 | Standard deviation, calculated according to biased estimator of variance. |
| std | X mean | Standard deviation, calculated according to unbiased estimator of variance. |
| range | minX | maxX - minX |
| midrange | (maxX+minX)/2 | (maxX - minX)/2 |
| maxabs | 0 | Maximum of absolute value of X. |