plot sine

import numpy as np
import matplotlib.pyplot as plt

y = np.linspace(0,1,1000)
x1 = np.sin( 2.5*np.pi*y - 0.3 )
x2 = -x1

fig = plt.figure(figsize=[3,6])
ax1 = fig.add_subplot(111)
ax1.grid(b=False)
plt.axis('off')

plt.xlim( [-1.2,1.2] )

plt.plot( x1, y, color='b' )
plt.plot( x2, y, color='b' )

plt.savefig("test.png",bbox_inches='tight',transparent=True)
# plt.show()