scipydendrogram
文档说:
dendrogram(Z, ...)
The dendrogram illustrates how each cluster is
composed by drawing a U-shaped link between a non-singleton
cluster and its children. ...It is expected that the distances in Z[:,2] be
monotonic, otherwise crossings appear in the dendrogram.
我不清楚关于“预计 Z[:,2] 中的距离是单调的,否则在树状图中会出现交叉点”这句话?图中的交叉点是指什么?有人可以举一个例子,说明特定距离矩阵会发生这种情况并解释原因吗?
这是穿越的例子吗?在我看来,这只是由距离矩阵中的一些对称性产生的......