这个问题解决了吗，后面还有The Hubert index is a graphical method of determining the number of clusters. In the plot of Hubert index, we seek a significant knee that corresponds to a  significant  increase of the value of the measure i.e the significant peak in Hubert index second differences plot. 这段话……是什么意思

同问题~我这边也是，这样报的，请问您是怎么解决的？