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Scatterplot obtained for the first two principal components after applying PCA to the whole dataset using (A): all the 17 features, (B): the 6 best features (16:0, 18:2n6c, 20:3n3 + 20:4n6, 14:0, 18:1n9 and 22:6n3); 0—Norway farmed, 1—Chile farmed, 2—Canada farmed, 3—Canada wild.
