pythonsparkpysparksklearnbiasvarianceunderfitoverfitnumpyarraysalgebraoverfittingridgelassoelasticnetregularizationdata Scienceclassificationelbowsilhouetteclusteringdendogrampandasseaborndata preparationimputationdata cleaningdata transformationwebhouse pricesexploratory analysiselastic netboostingrandom forestfacebookpoststweepytweetscollaborative filteringsimilaritymovielensmachine learningregressionscrapescrapingnaive bayessentiment analysisbsescipystatisticsHR Analyticsexplortory analysislinear regressionstatistical analysisarchitecturedriverexecutorRDDoperationsbest practicesamazing statssachincricketdataframelog filesunstructured datalog analysisrddsqlhdfsstreamingtwittertwitter trendunit testrecommendationsdeep learningneural networksembeddingbag of wordsimdbRNNLSTMdecision treeknncoronary diseasemllibdata sciencescikit-learnbigdatahadoopcustomer churnchurnmatrix factorizationalternating least squarerecommendationROCsensitivityspecificityCutoff probabilitydecision treessvmgerman credithypothesis testsdaily returnsstocks analysisdebugmonitoringspark UIkmeanRFM Analysisrossmannexploratorydataframesfeature engineeringpredictionpipelinesgradient boostingstatsmodellogistic regressionOptimal cutoffstock adjustrolling meansperiodic returns