检查代码：import matplotlib.pyplot as plt import numpy as np H = 10 # 代表 H 的值 R_range = np.linspace(1, 20, 100) # 代表 R 的取值范围 T_values = [] for R in R_range: T = math.pi / math.asin(H / (2 * R)) T_values.append(T) plt.plot(R_range, T_values) plt.xlabel('R') plt.ylabel('T') plt.title('T as a function of R with fixed H') plt.show()

代码本身是没有问题的，但是缺少了导入 math 库的语句，需要在开头加上 `import math`。

修改后的代码如下：

import matplotlib.pyplot as plt
import numpy as np
import math

H = 10  # 代表 H 的值
R_range = np.linspace(1, 20, 100)  # 代表 R 的取值范围

T_values = []
for R in R_range:
    T = math.pi / math.asin(H / (2 * R))
    T_values.append(T)

plt.plot(R_range, T_values)
plt.xlabel('R')
plt.ylabel('T')
plt.title('T as a function of R with fixed H')
plt.show()

这样就可以正常运行并画出图表了。

相关问题

优化以下代码，加入图例：import matplotlib.pyplot as plt import numpy as np lines = [] line_styles = ['-', ':', '--', '-.'] line_colors = ['red', 'black', 'green', 'blue'] x = np.linspace(0, 10, 1000) # YOUR CODE HERE fig, ax = plt.subplots() for i in range(0, 4): y = np.sin(x + i * np.pi/2) lines.append(plt.plot(x, y, linestyle=line_styles[i], color=line_colors[i])) plt.show()

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import numpy as np

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import numpy as np

line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', '以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', '以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green',以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', '以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

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line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

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line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

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import matplotlib.pyplot as plt
import numpy as np

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line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
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import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
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import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, =以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y,以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i],以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i],以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

plt以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

plt.show以下是优化后的代码，加入了图例：

import matplotlib.pyplot as plt
import numpy as np

line_styles = ['-', ':', '--', '-.']
line_colors = ['red', 'black', 'green', 'blue']

fig, ax = plt.subplots()

for i in range(len(line_styles)):
y = np.sin(x+i*np.pi/2)
line, = ax.plot(x, y, linestyle=line_styles[i], color=line_colors[i], label='Line '+str(i+1))
lines.append(line)

ax.legend(handles=lines)

plt.show()

用import matplotlib.pyplot as pltimport numpy as np绘制函数sinx和cosx在[0，2π]上的图像

好的，可以使用以下代码绘制sinx和cosx在[0，2π]上的图像：

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 2*np.pi, 100)
sin_x = np.sin(x)
cos_x = np.cos(x)

plt.plot(x, sin_x, label='sin(x)')
plt.plot(x, cos_x, label='cos(x)')
plt.legend()
plt.show()

这里使用`linspace`函数创建了一个包含100个点的从0到2π的等间隔数组，然后计算了对应的sinx和cosx值，最后用`plot`函数绘制出来。`legend`函数用于加上图例，`show`函数用于显示图像。