LVQ Pre-processing Automated Test Curse of dimensionality MLP calculation stratified sampling variable transformation discretization feature creation feature subset selection Nearest Neighbor Classifier association rules Apriori algorithm Numeric underflow pre processing data-mining multiple classification Naïve Bayes classifier zero count Dimensionality Reduction self-organizing map data pipeline roc curve specificity naive bayes random sampling pandas regression Preprocessing sensitivity perceptron trade-off Datamining Django Sampling Softmax k-means roc KNN entropy PIPELINE Aggregation Data Mining SOM MLP PCA spark clustering