plot画线形图（子图）

import numpyas np

import matplotlib.pyplotas plt

N =25

np.random.seed(100)

x = np.linspace(0., 10., N)

y = np.sin(x) **2 + np.cos(x)

plt.figure(figsize=(15, 10))

rows =2

columns =2

# 定义网格子图数量 两行、两列、间隔0.25

grid = plt.GridSpec(rows, columns, wspace=.25, hspace=.25)

# 定义线图线的样式

linesstyles = ['-', '--', '-.', ':']

# 线上的标记点

mark = [2, 5, 10, 12]

# 不同线的颜色定义

color = ['#00429d', '#627c94', '#f4777f', '#93003a']

for i in range(len(linesstyles)):

plt.subplot(grid[i])

plt.plot(x, y, 'o', label=r'$y = sin(x)^2+ cos(x)$', linestyle=linesstyles[i], ms=7,

            markevery=mark[i], color=color[i])

plt.axis('equal')

plt.xlabel('x(rad)')

plt.ylabel('y(rad)')

plt.legend()

plt.annotate("linestyle:'" +str(linesstyles[i]) +"'", xy=(0.5, -2.5), va='center', ha='left')

# plt.plot(x, y)

plt.show()

plot线形图标注误差范围

import numpyas np

import matplotlib.pyplotas plt

N =25

np.random.seed(100)

x = np.linspace(0., 10., N)

y = np.sin(x) **2 + np.cos(x)

plt.figure(figsize=(15, 10))

noise = np.random.random(N) *.7 +.4

plt.plot(x, y, ls='-', color='darkgreen', label=r'$y = sin(x)^2+ cos(x)$')

plt.fill_between(x, y + noise, y - noise, alpha=0.5, color='darkgreen')

plt.axis('equal')

plt.fill_between((2, 4), -3.2, 3.2, facecolor='orange')

plt.xlim(0, 10)

plt.ylim(-3, 3)

plt.xlabel('x(rad)')

plt.ylabel('y(rad)')

plt.legend()

plt.show()