大家好:
我在计算由角速度资料(b)与角位移资料(c)所成组的相位图(phase plot)时用了反函数atan2，举例式子是a=atan2(b,c)*180/pi，跑出来的数据如下:
a=
-14.5327
-9.7880
-9.7552
-9.8496
-12.3214
-14.3848
-18.1224
-23.1806
-28.4860
-34.6558
-40.8052
-45.8199
-49.8615
-53.5313
-56.3068
-59.3246
-62.9291
-66.2847
-69.4982
-73.5623
-77.1360
-80.2927
-84.4998
-88.7608
-92.6181
-97.0836
-101.8136
-106.6225
-111.6560
-117.3426
-121.8821
-126.4374
-130.8890
-135.4877
-139.3230
-143.6598
-147.5823
-151.1743
-152.6577
-153.1012
-151.8536
-151.1238
-149.7453
-151.9676
-154.2430
-157.9746
-161.4020
-165.2734
-164.3997
-164.2262
-164.3886
-164.5684
-164.7601
-166.7409
-168.6037
-170.0764
-172.0060
-174.8464
-178.8353
176.8210
171.6738
166.4896
162.6849
160.3933
157.9115
156.4301
154.2258
149.4389
142.2703
135.3745
128.3850
123.0225
118.7116
115.1354
112.4225
109.7294
106.0957
102.4160
98.6703
94.4670
89.9373
85.2112
79.8130
74.4712
70.5233
67.6185
67.8576
67.2684
65.7067
61.6403
57.9027
49.7366
42.2532
35.2150
30.3655
25.5905
24.5535
22.6497
20.3742
16.4996
11.0589
5.7224
0.3822
-2.3164
-3.0631
-1.7874
-0.1070
1.2855
-1.1074
-1.4933
-4.0869
0.0923
之後有使用unwrap矫正，式子为d=unwrap(a*pi/180)*180/pi，但是跑出来的图如下:
请问有哪边出错了吗?谢谢。