data filtering for clustering

Assuming that i have a data set like iris data set and i want to do clustering for the data. Before i perform the clustering, can i conduct data filtering on each species instead of filtering it as a whole data ? So, the data filter processing is on each species.

Many thanks in advance for the answer.

Answer 1

[Greg Heath]

No.

You are designing a classifier to classify unknown data. If each class was processed individually for training, you wouldn't know what set of normalization parameters to use for unknown data.

Hope this helps.

Greg

[Yasser]

many thanks Greg.