我正在尝试将RandomForest
方法应用于数据集,但出现此错误:
ValueError: Input contains NaN, infinity or a value too large for dtype ('float32')
有人可以告诉我我可以在函数中进行哪些修改以使代码起作用:
def ranks_RF(x_train, y_train, features_train, RESULT_PATH='Results'):
"""Get ranks from Random Forest"""
print("\nMétodo_Random_Forest")
random_forest = RandomForestRegressor(n_estimators=10)
np.nan_to_num(x_train)
np.nan_to_num(y_train)
random_forest.fit(x_train, y_train)
# Get rank by doing two times a sort.
imp_array = np.array(random_forest.feature_importances_)
imp_order = imp_array.argsort()
ranks = imp_order.argsort()
# Plot Random Forest
imp = pd.Series(random_forest.feature_importances_, index=x_train.columns)
imp = imp.sort_values()
imp.plot(kind="barh")
plt.xlabel("Importance")
plt.ylabel("Features")
plt.title("Feature importance using Random Forest")
# plt.show()
plt.savefig(RESULT_PATH + '/ranks_RF.png', bbox_inches='tight')
return ranks
使用np.isnan(X),对于包含NaN的位置,您会得到一个带True的布尔掩码。