accuracy_score
sklearn.metrics.accuracy_score
import numpy as np
from sklearn.metrics import accuracy_score
y_pred = [0, 1, 0, 1]
y_true = [0, 1, 1, 1]
print('ACC:',accuracy_score(y_true, y_pred))
#ACC:0.75
Precision
sklearn.metrics.precision_score
from sklearn import metrics
y_pred = [0, 1, 0, 0]
y_true = [0, 1, 0, 1]
print('Precision',metrics.precision_score(y_true, y_pred))
#Precision 1.0
Recall
sklearn.metrics.recall_score
from sklearn import metrics
y_pred = [0, 1, 0, 0]
y_true = [0, 1, 0, 1]
print('Recall',metrics.recall_score(y_true, y_pred))
#Recall 0.5
F1-score
sklearn.metrics.f1_score
from sklearn import metrics
y_pred = [0, 1, 0, 0]
y_true = [0, 1, 0, 1]
print('Recall',metrics.f1_score(y_true, y_pred))
#F1-score 0.6666666666666666
AUC
sklearn.metrics.roc_auc_score
import numpy as np
from sklearn.metrics
import roc_auc_score
y_true = np.array([0, 0, 1, 1])
y_scores = np.array([0.1, 0.4, 0.35, 0.8])
print('AUC socre:',roc_auc_score(y_true, y_scores))
#AUC socre: 0.75
MSE 、RMSE、MAE、MAPE
import numpy as np
from sklearn import metrics
# MAPE需要自己实现
def mape(y_true, y_pred):
return np.mean(np.abs((y_pred - y_true) / y_true))
y_true = np.array([1.0, 5.0, 4.0, 3.0, 2.0, 5.0, -3.0])
y_pred = np.array([1.0, 4.5, 3.8, 3.2, 3.0, 4.8, -2.2])
# MSE
print('MSE:',metrics.mean_squared_error(y_true, y_pred))
# RMSE
print('RMSE:',np.sqrt(metrics.mean_squared_error(y_true, y_pred)))
# MAE
print('MAE:',metrics.mean_absolute_error(y_true, y_pred))
# MAPE
print('MAPE:',mape(y_true, y_pred))
#MSE: 0.2871428571428571
#RMSE: 0.5358571238146014
#MAE: 0.4142857142857143
#MAPE: 0.1461904761904762
R2-score
from sklearn.metrics import r2_score
y_true = [3, -0.5, 2, 7]
y_pred = [2.5, 0.0, 2, 8]
print('R2-score:',r2_score(y_true, y_pred))
#R2-score: 0.9486081370449679