why is it necessary to cluster data when to reduce data dimension before clustering when do you reduce data dimension when to reduce dimensionality before clustering when should dimensionality be reduced before clustering when should you reduce dimensionality before clustering what is dimensionality before clustering vs data dimensions when is dimensionality reduction before clustering when can i use dimensionality before clustering when to cluster data in sql when should data dimensionality be reduced when to do clustering dimensionality which is true when evaluating a cluster in terms of dimensionality? when should you cut dimensions before clustering when to reduce data dimension before clustering is dimensionality reduction good before clustering what should you do first when clustering or dimensionality reduction when to do dimensionality reduction before clustering why reduce data dimension before clustering what is normal clustering data dimension