只需将指标更改为correlation，以使第一行变为:

Just change the metric to correlation so that the first line becomes:

Y=pdist(X, 'correlation')

但是，我认为代码可以简化为:

However, I believe that the code can be simplified to just:

Z=linkage(X, 'single', 'correlation')
dendrogram(Z, color_threshold=0)

因为链接将为您处理pdist.

because linkage will take care of the pdist for you.