discriminant of quadratic form

例句：

1. 1. Thediscrimination between two groups is crucial for decision-making.
   两组之间的区分对于决策至关重要。
2. 2.The discriminant function was usedto classify the data into different categories.
   判别函数被用来将数据分类到不同的类别中。
3. 3. The discriminantcoefficient is calculated by subtracting themean of each group from the mean ofthe entire sample.
   判别系数是通过从整个样本的均值中减去每个组的均值来计算的。