#画PR曲线
import numpy as np
import matplotlib.pyplot as plt
from sklearn import metrics ###计算roc和auc
y_score = [ 9.9851e-01, 9.9997e-01, 1.0000e+00, 1.0000e+00, 9.9711e-01,
9.9997e-01, 9.9913e-01, 8.4129e-05, 9.9940e-01, 9.9549e-01,
6.3709e-03, 9.9890e-01, 2.8921e-02, 9.9298e-01, 9.9845e-01,
1.2955e-03, 1.0470e-05, 5.0030e-04, 1.0792e-04, 9.9993e-01,
6.8361e-01, 9.9999e-01, 9.3790e-01, 8.4222e-01, 1.0000e+00,
3.7036e-03, 9.9920e-01, 6.8316e-01, 2.6265e-14, 9.9859e-01,
6.4708e-02, 1.0000e+00, 9.8933e-01, 7.2793e-05, 9.9987e-01,
1.2028e-04, 1.0000e+00, 1.8870e-07, 9.9999e-01, 1.0000e+00,
9.9999e-01, 1.0000e+00, 1.0000e+00, 1.0000e+00, 7.8533e-03,
1.8890e-04, 1.0000e+00, 2.5989e-02, 9.9999e-01, 4.6810e-02,
9.9897e-01, 1.9922e-04, 2.6834e-04, 7.1890e-02, 6.4201e-01,
1.1148e-01, 6.1339e-06, 1.1345e-01, 8.6041e-01, 1.7573e-02,
6.1877e-01, 1.0000e+00, 8.6309e-01, 1.0000e+00, 1.9857e-01,
1.0000e+00, 9.9999e-01, 4.7447e-04, 9.9927e-01, 1.0522e-06,
9.9999e-01, 1.0000e+00, 6.0466e-07, 1.0000e+00, 4.3941e-05,
4.1809e-02, 3.4526e-09, 1.6633e-07, 8.3515e-07, 9.9989e-01,
4.0750e-01, 5.4201e-08, 1.3404e-09, 1.6206e-03, 3.2980e-01,
2.1062e-06, 3.2605e-03, 9.9847e-01, 7.6638e-07, 9.6480e-01,
1.2248e-05, 6.0582e-01, 9.9997e-01, 9.9997e-01, 2.1907e-04,
3.1958e-01, 2.6135e-02, 1.4250e-01, 9.0930e-06, 3.6019e-05,
1.0000e+00, 8.2119e-01, 2.2820e-02, 9.9970e-01, 2.2836e-06,
2.1747e-01, 1.2492e-06, 6.6268e-01, 9.4269e-01, 9.9999e-01,
6.0224e-01, 1.0339e-04, 4.6033e-01, 9.9127e-01, 2.1745e-02,
2.7529e-05, 5.1265e-01, 4.0928e-03, 1.0000e+00, 2.2949e-05,
9.9689e-01, 9.8733e-01, 6.9968e-05, 1.2510e-13, 9.2999e-01,
5.2054e-05, 4.0495e-02, 2.6996e-06,9.9880e-01, 9.8693e-01, 2.9835e-01, 9.9989e-01, 8.4126e-03,
6.8882e-05, 8.8586e-03, 1.0000e+00, 6.1230e-10, 9.9997e-01,
1.0000e+00, 1.7148e-08, 1.0000e+00, 6.7212e-06, 1.1449e-05,
4.8784e-02, 1.0000e+00, 2.6514e-06, 1.0000e+00, 8.8992e-08,
6.4772e-08, 4.0303e-07, 1.7111e-08, 7.1858e-08, 8.2972e-08,
9.9997e-01, 1.0000e+00, 1.0000e+00, 1.0000e+00, 1.0000e+00,
1.0000e+00, 1.6598e-08, 9.9999e-01, 4.4640e-09, 8.1506e-01,
8.1549e-05, 6.6065e-05, 1.8652e-09, 2.3904e-13, 9.9978e-01,
1.0000e+00, 1.0000e+00, 4.3819e-12, 1.0000e+00, 9.9985e-01,
9.9969e-01, 3.9544e-06, 9.9999e-01, 1.0000e+00, 1.0000e+00,
9.9962e-01, 5.4252e-12, 9.9999e-01, 3.1807e-09, 1.0000e+00,
2.7246e-06, 1.0000e+00, 3.4905e-06, 2.9352e-05, 1.0000e+00,
9.8905e-06, 9.9999e-01, 1.0000e+00, 4.3435e-08, 1.0000e+00,
3.2698e-06, 1.0000e+00, 6.1964e-08, 9.9998e-01, 1.1808e-08,
1.0000e+00, 1.3313e-09, 1.0000e+00, 9.1215e-05, 1.0000e+00,
9.9999e-01, 1.8799e-05, 1.4784e-09, 1.0000e+00, 2.1517e-09,
7.4920e-09, 1.0000e+00, 7.0349e-08, 6.6840e-09, 1.0000e+00,
1.5083e-09, 9.9997e-01, 1.1912e-07, 1.4259e-11, 9.9990e-01,
4.8948e-06, 1.0000e+00, 3.7790e-07, 1.0000e+00, 5.2548e-05,
1.0000e+00, 9.8434e-07, 8.0895e-01, 3.1273e-02, 1.9782e-05,
9.9975e-01, 1.0000e+00, 2.5450e-07, 3.4767e-07, 1.0000e+00,
1.0000e+00, 1.0000e+00, 4.6116e-05, 1.0000e+00, 3.2100e-05,
2.5731e-05, 1.4733e-07, 1.0000e+00, 1.0000e+00, 1.0000e+00,
1.1246e-06, 2.4184e-04, 1.0000e+00, 1.0000e+00, 4.1336e-10,
1.0000e+00, 3.1744e-05, 9.9999e-01, 1.0000e+00, 1.0544e-06,
2.4347e-06, 9.9991e-01, 6.7946e-10, 1.0000e+00, 7.5963e-08, 1.0000e+00, 1.3206e-07, 9.9998e-01,
7.1259e-11, 1.0000e+00, 2.1090e-01, 1.0000e+00, 1.0000e+00,
5.8330e-01, 1.0000e+00, 9.9998e-01, 4.8566e-07, 1.0000e+00,
3.9619e-06, 1.0000e+00, 1.0000e+00, 1.6349e-07, 1.8042e-06,
9.9966e-01, 8.6250e-07, 1.0000e+00, 1.0000e+00, 1.0000e+00,
1.0000e+00, 1.0000e+00, 9.9999e-01, 8.8150e-01, 1.1298e-07,
2.6820e-06, 9.9253e-01, 6.0419e-08, 9.9927e-01, 1.0000e+00,
1.5348e-06, 1.0000e+00, 9.9974e-01, 4.4206e-08, 1.0000e+00,
1.0000e+00, 1.0000e+00, 1.0000e+00, 2.6568e-06, 9.9999e-01,
1.0000e+00, 3.3616e-06, 9.9996e-01, 6.1177e-04, 2.7520e-04,
1.0000e+00, 1.0000e+00, 1.0000e+00, 9.9998e-01, 2.9589e-09,
9.9914e-01, 1.0000e+00, 7.5814e-06, 1.0000e+00, 9.8563e-01,
5.7107e-10, 1.0000e+00, 2.9358e-05, 9.9816e-01, 7.6606e-05,
1.0000e+00, 1.2098e-05, 2.0024e-10, 1.0000e+00, 7.8922e-07,
9.9997e-01, 4.5417e-04, 9.9998e-01, 2.1048e-12, 9.9998e-01,
1.0000e+00, 1.0000e+00, 1.0000e+00, 1.0000e+00, 2.5177e-05,
7.7803e-10, 9.9999e-01, 1.0000e+00, 1.0000e+00, 1.0000e+00,
1.0000e+00, 1.0000e+00, 1.0000e+00, 1.0000e+00, 8.2414e-01,
1.0000e+00, 3.1679e-10, 9.9999e-01, 3.3770e-09, 9.9999e-01,
4.5487e-07, 8.3379e-01, 1.0000e+00, 1.0000e+00, 1.0000e+00,
1.0000e+00, 1.0000e+00, 9.9990e-01, 1.4393e-09, 9.9999e-01,
9.9996e-01, 9.9992e-01, 1.0000e+00, 1.0000e+00, 1.0000e+00,
5.1302e-07, 3.6753e-09, 1.0000e+00, 1.0000e+00, 7.2734e-08,
5.8410e-05, 9.9995e-01, 8.5471e-07, 1.0000e+00, 1.0000e+00,
2.9306e-01, 1.0000e+00, 4.7422e-06, 1.7867e-03, 1.0000e+00,
1.0000e+00, 6.0311e-09, 1.0000e+00, 1.0000e+00, 8.4827e-09, 1.0000e+00, 1.0000e+00, 5.4047e-09,
1.7192e-07, 9.9988e-01, 9.2511e-08, 1.0000e+00, 1.0000e+00,
1.0000e+00, 7.8191e-08, 1.0000e+00, 1.0000e+00, 1.0000e+00,
2.4809e-06, 1.0000e+00, 7.0371e-09, 6.5127e-12, 9.8816e-01,
1.0000e+00, 7.0720e-07, 1.0000e+00, 1.0000e+00, 9.9999e-01,
9.9998e-01, 1.0000e+00, 1.0000e+00, 1.0000e+00, 3.4725e-10,
1.9239e-06, 9.9886e-01, 5.8176e-08, 1.7001e-06, 1.0000e+00,
6.2994e-04, 1.0000e+00, 1.2081e-04, 6.2985e-09, 1.0000e+00,
4.8864e-07, 1.0000e+00, 8.6360e-11, 1.0000e+00, 3.9228e-08,
2.0253e-07, 1.0000e+00, 1.0000e+00, 3.2947e-07, 7.0709e-12,
9.9952e-01, 1.0000e+00, 1.0000e+00, 1.0000e+00, 1.0000e+00,
1.8704e-05, 3.9649e-08, 1.0000e+00, 1.0000e+00, 4.8392e-06,
1.0000e+00, 1.1054e-10, 1.0000e+00, 5.9257e-16, 1.6800e-04,
1.0000e+00, 3.4565e-06, 1.0000e+00, 1.0249e-05, 6.3914e-05,
1.0000e+00, 7.1082e-11, 2.4418e-12, 9.9982e-01, 9.9999e-01,
3.4777e-03, 9.9999e-01, 2.4618e-10, 1.0000e+00, 6.3010e-09,
1.0416e-09, 9.9058e-01, 1.0000e+00, 3.2960e-05, 5.1490e-13,
1.0000e+00, 1.0000e+00, 2.3734e-04, 3.2588e-07, 1.0000e+00,
1.4779e-06, 1.0000e+00, 2.3104e-10, 9.9998e-01, 9.9999e-01,
2.9136e-10, 9.9999e-01, 1.3683e-08, 1.7976e-07, 9.9983e-01,
3.1666e-06, 4.1248e-06, 8.4381e-07, 9.9998e-01, 3.6832e-06,
3.8006e-06, 9.9983e-01, 1.0000e+00, 6.7821e-08, 1.3557e-08,
1.0000e+00, 1.0000e+00, 7.9802e-03, 1.0000e+00, 9.8945e-01,
2.4669e-04, 1.0000e+00, 7.4492e-07, 1.0000e+00, 1.3954e-02,
1.0000e+00, 1.0846e-07, 9.6761e-11, 1.0000e+00, 1.0000e+00,
2.7915e-06, 3.6568e-08, 6.9262e-08, 2.5593e-06, 1.1284e-11, 1.3780e-01, 1.0000e+00, 7.9982e-06,
2.5574e-08, 9.9837e-01, 6.1947e-08, 9.9978e-01, 4.3517e-11,
1.0000e+00, 1.0538e-08, 1.0000e+00, 5.9406e-10, 1.0000e+00,
1.0000e+00, 5.5782e-09, 2.4304e-10, 1.0000e+00, 1.0000e+00,
4.8344e-09, 1.0000e+00, 3.1077e-13, 2.2091e-05, 8.2426e-02,
3.6654e-11, 7.6557e-08, 6.3855e-11, 1.0000e+00, 1.0000e+00,
1.5186e-10, 3.9777e-11, 1.0000e+00, 1.0000e+00, 9.9975e-01,
1.6044e-10, 3.1784e-09, 9.9911e-01, 5.4308e-07, 1.0000e+00,
1.0000e+00, 1.9014e-11, 1.0000e+00, 3.9231e-06, 3.1050e-07,
1.0000e+00, 2.7031e-05, 1.0000e+00, 9.8138e-01, 1.0000e+00,
1.8816e-09, 9.9999e-01, 1.0000e+00, 6.7595e-08, 1.3619e-08,
9.9888e-01, 4.1556e-07, 1.2928e-12, 1.0000e+00, 9.9918e-01,
4.5048e-06, 9.9991e-01, 5.0555e-10, 8.0632e-11, 9.9990e-01,
9.8021e-10, 1.2623e-08, 9.8738e-01, 1.2176e-06, 1.0000e+00,
1.0000e+00, 5.0820e-08, 9.3541e-01, 8.0202e-09, 1.0000e+00,
1.1401e-07, 3.5547e-10, 2.7973e-02, 6.2540e-01, 1.5087e-10,
1.3505e-09, 2.6094e-07, 5.2484e-09, 6.3256e-07, 7.8440e-07,
1.0000e+00, 5.0651e-10, 1.4844e-09, 6.4393e-11, 1.0000e+00,
3.4127e-10, 1.0000e+00, 1.4658e-04, 1.0000e+00, 3.2133e-06,
5.5449e-02, 9.9992e-01, 6.5473e-07, 1.0000e+00, 9.7145e-08,
1.0000e+00, 1.0000e+00, 9.1511e-07, 9.9960e-01, 4.6388e-08,
9.1321e-06, 9.9934e-01, 2.0286e-08, 1.0000e+00, 7.6241e-09,
1.0000e+00, 6.0771e-06, 9.9995e-01, 2.0597e-06, 1.0000e+00,
9.9999e-01, 2.0370e-07, 1.0000e+00, 1.0000e+00, 4.4022e-09,
7.7162e-06, 1.0000e+00, 1.0000e+00, 9.9999e-01, 9.1957e-10,
9.9600e-01, 2.3197e-09, 1.0000e+00, 6.2079e-10, 4.3248e-06, 1.0000e+00, 1.0662e-08, 9.9996e-01,
1.0000e+00, 2.8324e-11, 5.4074e-13, 1.0000e+00, 1.8376e-09,
1.0000e+00, 1.0000e+00, 1.0000e+00, 5.6099e-07, 1.0000e+00,
3.1398e-06, 1.8213e-11, 1.0000e+00, 1.8683e-10, 5.3258e-12,
1.1874e-08, 1.0000e+00, 2.1775e-09, 9.9876e-01, 1.0000e+00,
1.1038e-07, 9.9630e-01, 1.0000e+00, 1.0000e+00, 9.9991e-01,
9.9993e-01, 1.0000e+00, 9.9994e-01, 1.0000e+00, 1.0000e+00,
9.8513e-01, 1.0000e+00, 9.9991e-01, 1.0000e+00, 1.0000e+00,
9.9998e-01, 1.0000e+00, 9.0598e-01, 1.0000e+00, 1.0000e+00,
9.9997e-01, 1.0000e+00, 9.9998e-01, 1.0000e+00, 1.0000e+00,
1.0000e+00, 1.9014e-04, 9.8399e-01, 9.9997e-01, 9.9830e-01,
9.4997e-01, 9.9999e-01, 9.9586e-01, 1.6980e-05, 9.5872e-01,
6.8015e-01, 1.7353e-06, 9.9997e-01, 9.0243e-01, 9.9999e-01,
4.9356e-02, 7.9772e-01, 9.8660e-09, 2.1493e-03, 9.6290e-01,
1.0022e-02, 2.0648e-04, 1.0000e+00, 4.3441e-10, 9.9997e-01,
1.0000e+00, 9.9972e-01, 3.7952e-01, 9.9616e-01, 1.0000e+00,
1.3085e-07, 7.1047e-07, 9.9999e-01, 1.0000e+00, 2.1096e-01,
2.1710e-01, 9.9999e-01, 1.0000e+00, 3.2707e-09, 9.9998e-01,
9.5695e-01, 1.0000e+00, 9.9993e-01, 1.0000e+00, 9.3975e-04,
1.0000e+00, 1.5765e-03, 1.0000e+00, 5.0613e-03, 9.7049e-01,
9.9994e-01, 9.9312e-01, 3.1691e-05, 1.0073e-07, 5.0117e-03,
9.6510e-01, 5.0843e-01, 2.7408e-05, 2.4712e-05, 2.0924e-01,
3.5439e-02, 3.3662e-02, 1.0000e+00, 1.0000e+00, 2.2658e-01,
9.9968e-01, 1.0000e+00, 9.9977e-01, 9.9984e-01, 3.4074e-06,
2.7410e-06, 1.0000e+00, 1.0000e+00, 6.6023e-07, 4.9228e-07,
9.9869e-01, 9.1091e-02, 1.1663e-07, 1.4192e-09, 1.5327e-05, 7.4474e-06, 4.8801e-01, 6.4667e-04,
2.3570e-03, 1.0504e-03, 8.9965e-01, 7.3365e-01, 2.1573e-10,
8.4996e-01, 3.2954e-03, 9.9890e-01, 6.3002e-04, 8.4769e-01,
2.3065e-03, 9.9984e-01, 6.1653e-03, 1.8803e-02, 5.6274e-02,
1.1619e-05, 3.9471e-11, 7.8479e-01, 1.7970e-03, 1.0000e+00,
5.5835e-01, 9.9999e-01, 1.6650e-07, 8.7065e-02, 1.8843e-07,
1.8546e-02, 2.7420e-02, 4.3483e-01, 1.0000e+00, 6.8027e-01,
3.7601e-04, 6.4353e-02, 9.2600e-01, 9.9945e-01, 9.7244e-01,
9.9993e-01, 2.8215e-03, 2.3968e-04, 1.0000e+00, 9.9958e-01,
7.6044e-09, 5.5400e-01, 7.0238e-11, 3.5212e-08, 8.3071e-07,
2.4510e-05, 9.9999e-01, 9.9980e-01, 9.9998e-01, 2.8390e-02,
1.4055e-06, 9.1803e-10, 1.0000e+00, 3.1567e-06, 2.5945e-05,
9.9999e-01]
y_test = [ 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1,
1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1,
0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1,
1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1,
0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0,
1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,
1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1,
0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0,
1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0,
0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0,
0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1,
1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1,
0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0,
1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0,
1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0,
1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0,
1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0,
1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0,
1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1,
1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1,
1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1,
1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0,
1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1,
1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0,
1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1,
0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1,
1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1,
1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1,
0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0,
0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0,
1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0,
0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0,
0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1,
0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0,
0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0,
1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0,
1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0,
1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1,
0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1,
1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0,
1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0,
1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1,
0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0,
1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1,
0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1,
0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1,
0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1,
1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1,
0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0,
0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0,
0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0,
0, 1, 0, 0, 1]
precision, recall, _thresholds = metrics.precision_recall_curve(y_test, y_score)
auc = metrics.auc(recall, precision)
lw = 2
plt.figure(figsize=(10,10), facecolor=(1, 1, 1))
plt.plot(precision, recall, color='darkorange',
lw=lw, label=' (AUC = %0.2f)' % auc) ###假正率为横坐标,真正率为纵坐标做曲线
plt.plot([0, 1], [1, 0], color='navy', lw=lw, linestyle='--')
plt.xlim([0.0, 1.0])
plt.ylim([0.0, 1.0])
# 设置刻度字体大小
plt.xticks(fontsize=15)
plt.yticks(fontsize=15)
plt.xlabel('recall', fontsize=20)
plt.ylabel('precision', fontsize=20)
#plt.title('Receiver operating characteristic example')
plt.legend(loc="upper right")
plt.show()
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