DataSplit()
partition of data (train-test-split)
add_probs_dfs()
addition of probability-data-frames
barplot_feat_select()
plot important features
class_folds()
stratified folds (in classification)
feature_selection()
Feature selection
func_correlation()
find correlated variables
func_shuffle()
shuffle data
normalized()
normalize data
regr_folds()
create folds (in regression)
wrapper_feat_select()
Wraps all three methods