Data Science, Machine Learning, Statistics, Open Source, Crossvalidation.
our model in production. Let’s implement it: Console output: (1/1): Cross-validated accuracy: (0.98 + 0.92 + 0.96) / 3 = 0.95 So now we got a result (0.95) that’s between the first (methodologically wrong) approach (0.97) and the second train/test approach (0.91). Model selection We have a way of