Machine Learning, Towards Data Science, AI, Data Science, Data Preprocessing.
can see that PCA only improve LDA and RF, so PCA is not a magic solution. It’s fine. We didn’t hypertune the n_components parameter, and even if we did, PCA doesn’t guarantee to improve predictions. We can see that StandardScaler and MinMaxScaler achieve best scores only in 4 out of 16 cases. So we