Non stratified experiments

Remove reference column in analysis

testwodt.py

@@ -1,6 +1,6 @@
 import argparse
 from wodt import TreeClassifier
-from sklearn.model_selection import cross_val_score
+from sklearn.model_selection import KFold, cross_val_score
 import numpy as np
 import random
 from experimentation.Sets import Datasets
@@ -85,8 +85,9 @@ def process_dataset(dataset, verbose):
     for random_state in random_seeds:
         random.seed(random_state)
         np.random.seed(random_state)
+        kfold = KFold(shuffle=True, random_state=random_state, n_splits=5)
         clf = TreeClassifier(random_state=random_state)
-        res = cross_val_score(clf, X, y, cv=5)
+        res = cross_val_score(clf, X, y, cv=kfold)
         scores.append(res)
         if verbose:
             print(