"""
    Validation Curve
    https://machinelearningmastery.com/learning-curves-for-diagnosing-machine-learning-model-performance/
"""

print("[+] Validation Curve")
x = df.drop(['label','lld'],axis=1).values
y = df['label'].values

param_range = np.logspace(-6, -1, 5)
train_scores, test_scores = validation_curve(
    DecisionTreeClassifier(), x, y, param_name='gamma', param_range=param_range,
    scoring="accuracy", n_jobs=1)
train_scores_mean = np.mean(train_scores, axis=1)
train_scores_std = np.std(train_scores, axis=1)
test_scores_mean = np.mean(test_scores, axis=1)
test_scores_std = np.std(test_scores, axis=1)

plt.title("Validation Curve with SVM")
plt.xlabel(r"$\gamma$")
plt.ylabel("Score")
plt.ylim(0.0, 1.1)
lw = 2
plt.semilogx(param_range, train_scores_mean, label="Training score",
             color="darkorange", lw=lw)
plt.fill_between(param_range, train_scores_mean - train_scores_std,
                 train_scores_mean + train_scores_std, alpha=0.2,
                 color="darkorange", lw=lw)
plt.semilogx(param_range, test_scores_mean, label="Cross-validation score",
             color="navy", lw=lw)
plt.fill_between(param_range, test_scores_mean - test_scores_std,
                 test_scores_mean + test_scores_std, alpha=0.2,
                 color="navy", lw=lw)
plt.legend(loc="best")
plt.savefig('img/validation_curve_svm.png')
plt.show()
