>>>>> "Dan" == Dan Bolser <[EMAIL PROTECTED]> >>>>> on Mon, 11 Oct 2004 16:21:53 +0100 (BST) writes:
Dan> Gives strange results. Dan> I get 'weird' dendrograms with canberra / binary distance metric and Dan> median / centroid cluster methods. it doesn't depend on the metric: Both 'median' and 'centroid' methods are known to *not* guarantee ``monotone distance measures'', or equivalently to possibly lead to dendrograms with so called ``inversions''. We should add this to help page for hclust(). Probably for this reason, agnes() from the cluster package doesn't have these two methods [explicitly] -- though it now allows general parameter Lance-William formula methods which can also lead to inversions. Dan> Is this just my data? evidently not. Though the problem does not appear for all data sets... Regards, Martin Maechler ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html