accuracy: SVM - logistic per fold [ 0.018  0.018 -0.035  0.    -0.018  0.018  0.018  0.     0.     0.   ]
  mean difference +0.0018, std 0.0174, SVM better in 4 folds, worse in 2
roc_auc: SVM - logistic per fold [ 0.006  0.003  0.    -0.001 -0.001  0.003  0.001  0.     0.    -0.001]
  mean difference +0.0009, std 0.0025, SVM better in 4 folds, worse in 3
