产生的原因在于单位权方差与分布的总体方差不相等。
The cause is that the unit weight estimation variance and the generality variance of the distribution don't equal with each other.
Bayes分类1三类协方差不相等2三类协方差相等3编程上机画出三类分类界线或分界面。
Bayes classification 1 three types of covariance not equal 2 three equal covariance 3 programming line on the machine to draw three categories or sub-interface.
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