Python matplotlib教學 入門 – 散佈圖

import matplotlib.pyplot as plt

#data
x = [1, 3, 5, 7, 9]
y = [2, 4, 6, 8, 10]

# 製作figure  
fig = plt.figure()   

#圖表的設定
ax = fig.add_subplot(1, 1, 1)

#散佈圖
ax.scatter(x, y, color='red')
plt.show() 

import matplotlib.pyplot as plt
import numpy as np

#生成隨機的data 30個
x = np.random.rand(30)
y = np.random.rand(30)

#製作figure
fig = plt.figure()

#設定axes
ax = fig.add_subplot(1, 1, 1)

#設定散佈圖的顏色，大小等等
ax.scatter(x, y, s=250, alpha=0.4, linewidths=2.5, c='#AAAFFF', edgecolors='blue')

plt.show()

ax.scatter(x, y, s=250, alpha=0.4, linewidths=2.5, c='#AAAFFF', edgecolors='blue')

import matplotlib.pyplot as plt
import numpy as np

#生成隨機的data 30個
x1 = np.random.rand(30)
y1 = np.random.rand(30)
x2 = np.random.rand(30)
y2 = np.random.rand(30)


#製作figure
fig = plt.figure()

#設定axes
ax = fig.add_subplot(1, 1, 1)

#設定x1, y1散佈圖的顏色，大小等等(藍色)
ax.scatter(x1, y1, s=250, alpha=0.4, linewidths=2.5, c='#AAAFFF', edgecolors='blue')

#設定x2, y2散佈圖的顏色，大小等等(紅色)
ax.scatter(x2, y2, s=250, alpha=0.4, linewidths=2.5, c='#FFFAAA', edgecolors='red')

plt.show()

import matplotlib.pyplot as plt
import numpy as np

#生成隨機的data 30個
x1 = np.random.rand(30)
y1 = np.random.rand(30)
x2 = np.random.rand(30)
y2 = np.random.rand(30)
x3 = np.random.rand(30)
y3 = np.random.rand(30)


#製作figure
fig = plt.figure()

#設定axes
ax = fig.add_subplot(1, 1, 1)

#五邊形
ax.scatter(x1, y1, s=250, alpha=0.4, linewidths=2.5, c='#AAAFFF', edgecolors='blue', marker='p')
#方形
ax.scatter(x2, y2, s=250, alpha=0.4, linewidths=2.5, c='#FFFAAA', edgecolors='red', marker='s')
#星形
ax.scatter(x3, y3, s=250, alpha=0.4, linewidths=2.5, c='b', edgecolors='gray', marker='*')

plt.show()

import matplotlib.pyplot as plt
import numpy as np

#生成隨機的data 30個
x1 = np.random.rand(30)
y1 = np.random.rand(30)
x2 = np.random.rand(30)
y2 = np.random.rand(30)
x3 = np.random.rand(30)
y3 = np.random.rand(30)


#製作figure
fig = plt.figure()

#設定axes
ax = fig.add_subplot(1, 1, 1)

#五邊形
ax.scatter(x1, y1, s=250, alpha=0.4, linewidths=2.5, c='#AAAFFF', edgecolors='blue', marker='p')
#方形
ax.scatter(x2, y2, s=250, alpha=0.4, linewidths=2.5, c='#FFFAAA', edgecolors='red', marker='s')
#星形
ax.scatter(x3, y3, s=250, alpha=0.4, linewidths=2.5, c='b', edgecolors='gray', marker='*')

#圖例，標題等
ax.grid(True)
ax.set_xlim(left=0, right=1.2)
ax.set_ylim(bottom=-0, top=1.2)
ax.set_xlabel('x')
ax.set_ylabel('y')
ax.set_title('Sample Title')
ax.legend(['x1, y1', 'x2, y2', 'x3, y3'])

plt.show()