为什么 y 轴的增量为 1 而不是 90

Question

I want to make a sine graph but the y-axis is off, how can i change that.

Also that do the 3 numbers in the brackets after linspace mean?

    import matplotlib.pyplot as plt
import numpy as np


x = np.linspace(0, 7, 100)
y = np.sin(x)


plt.plot(x, y)
plt.grid(True)
plt.show()

Thank You

Answer 1

See set_xlim to adjust the limits of the x-axis.

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 7, 100)
y = np.sin(x)

fig, ax = plt.subplots()
ax.plot(x,y)
ax.grid(True)
ax.set_xlim(0,7)
plt.show()

Before:

After:

The three numbers in the np.linspace command mean start , stop , and num . Ie it generates an array of 100 evenly spaced numbers between 0 and 7.