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In this tutorial we will learn how to delete or drop the duplicate row of a dataframe in python pandas with example using drop_duplicates() function. lets learn how to sklearn.decomposition.PCA¶ class sklearn.decomposition.PCA (n_components=None, copy=True, whiten=False, svd_solver='auto', tol=0.0, iterated_power='auto', random_state=None) [source] ¶ Principal component analysis (PCA). Linear dimensionality reduction using Singular Value Decomposition of the data to project it to a lower dimensional space. Hi, I use a dataset called airquality from R datasets. I want to show the values in a smallet scale than huge numbers. Can i normalize or scale it to smaller ratio??