UMAP Uniform manifold approximation and projection or in short UMAP is a type of dimension reduction techniques. So, basically UMAP will project a set of features into a smaller space.
Principal component analysis (PCA) PCA is a dimension reduction techniques. So, if we have a large number of predictors, instead of using all the predictors for modelling or other analysis, we can compressed all the information from the variables and create a new set of variables.
Background Genetic algorithm is inspired by a natural selection process by which the fittest individuals be selected to reproduce. This algorithm has been used in optimization and search problem, and also, can be used for variable selection.
Overview Imbalance data happens when there is unequal distribution of data within a categorical outcome variable. Imbalance data occurs due to several reasons such as biased sampling method and measurement errors.