Discriminant & TableOfReal: To TableOfReal (mahalanobis)...

Calculate Mahalanobis distances for the selected TableOfReal with respect to one group in the selected Discriminant object.

### Settings

Group label
defines which group mean to use for the distance calculation.
Pool covariance matrices
when on, use a pooled covariance matrix instead of the group covariance matrix.

### Example

Calculate the number of datapoints that are within the one-sigma elipses of two different groups, i.e. the number of data points that are in the overlapping area.

Suppose the group labels are ø and ʏ.

```    pols50m = Create TableOfReal (Pols 1973): "no"``` ```    Formula: ~ log10 (self)``` ```    discriminant = To Discriminant``` ```    selectObject: pols50m, discriminant``` ```    t1 = To TableOfReal (mahalanobis): "\o/", "no"``` ```    selectObject: pols50m, discriminant``` ```    t2 = To TableOfReal (mahalanobis): "\yc", "no"```

Now we count when both the t1 and t2 values are smaller than 1 (sigma):

```    Copy: "tr"``` ```    Formula: ~ object [t1] < 1 and object [t2] < 1``` ```    Extract rows where column: 1, "equal to", 1``` ```    no = Get number of rows"```