: The outcome you measure in response to changes.
: In health management models, use data downscaling to focus on high-risk prediction analysis. Semantic Priors : If data is scarce ( mai.qiuyi.1.var
: Use methods like PChclust (Principal Component Hierarchical Clustering) to summarize variance. A common threshold is to stop splitting branches if the first principal component explains more than 70% of the variance. : The outcome you measure in response to changes