Hello - I am running a proc cluster procedure. My data is unique based on an AppID and nonmissing, and I am specifying the outtree option with the ID = AppID. However, the output dataset is almost double the size of my original input dataset. I noticed in the output dataset, there are new observations created for the cluster number, where the AppID is a missing value. I could not find any documentation that explains what is happening. Could you please help explain this? I would like to use proc tree to prune the clusters and this is causing errors. Thanks.
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