Technical requirementsThe missionThe approachThe preparationsLoading the librariesUnderstanding and preparing the dataUnderstanding the effect of irrelevant featuresCreating a base modelEvaluating the modelTraining the base model at different max depthsReviewing filter-based feature selection methodsBasic filter-based methodsConstant features with a variance thresholdQuasi-constant features with Value-CountsDuplicating featuresRemoving unnecessary featuresCorrelation filter-based methodsRanking filter-based methodsComparing filter-based methodsExploring embedded feature selection methodsDiscovering wrapper, hybrid, and advanced feature selection methodsWrapper methodsSequential forward selection (SFS)Sequential Backward Selection (SBS)Hybrid methodsRecursive feature eliminationAdvanced methodsDimensionality reductionModel-agnostic feature importanceGenetic algorithmsEvaluating all feature-selected modelsConsidering feature engineeringMission accomplishedSummaryDataset sourcesFurther reading