And it represents that the F1 score, which is the harmonic mean of the precision and recall of the model and can better measure the performance and quality of the classifier, peaks when the number of terms is 800. As a result, an Uni-gram model collecting the 800 words with the highest...
Stacking, also known as Stacked Generalization is an ensemble technique that combines multiple classifications or regression models via a meta-classifier or a meta-regressor. The base-level models are trained on a complete training set, then the meta-model is trained on the features that are outpu...
Examples can be given if, in continuous and discreet data on the gender of people and being male = 1 and female = 2, a 1.5 is received because this does not mean a new gender, but an error. Another type of error is the fraud of clicks on pages, clicks made by robots, hidden ads...