我无法为y = sin（x）创建图

Question

enter code here
import numpy as np  
import math  
import matplotlib.pylab as plt  
a=np.linspace(3,6,10)  
plt.plot(a,math.sin(a))  
plt.show()

The output says ****TypeError: only size-1 arrays can be converted to Python scalars

Answer 1

Use np.sin or np.vectorize(math.sin) .

---

import numpy as np  
import math  
import matplotlib.pylab as plt  
a = np.linspace(3,6,10)  
plt.plot(a, np.sin(a))  
plt.show()

---

Note that np.sin , like math.sin , takes radians rather than degrees , so you may want to adjust your array ( a ) accordingly, or use np.rad2deg because at the moment the result is:

Whereas if you were to pass in floats between 0 and 2 * math.pi , you would get a nice sine wave: