matplotlib.pyplot.stem(*args, linefmt=None, markerfmt=None, basefmt=None, bottom=0, label=None, use_line_collection=True, orientation='vertical', data=None)

import matplotlib.pyplot as plt
import numpy as np
x = np.linspace(0.1, 2 * np.pi, 41)
y = np.exp(np.sin(x))
plt.stem(x, y)
plt.show()

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0.1,2 * np.pi, 41)
y = np.exp(np.sin(x))
fit, axs = plt.subplots(nrows=2, ncols=2, figsize=(14,7))
axs[0,0].set_title("linefmt='-',color='green'")
axs[0,0] = axs[0,0].stem(x,y,linefmt='g-')
axs[0,1].set_title("linefmt='-.', color='blue'")
axs[0,1] = axs[0,1].stem(x,y,linefmt='b-.')
axs[1,0].set_title("linefmt=':', color='red'")
axs[1,0] = axs[1,0].stem(x,y,linefmt='r:')
axs[1,1].set_title("linefmt='--', color='p'")
axs[1,1] = axs[1,1].stem(x,y,linefmt='o--')
plt.show()

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0.1,2 * np.pi, 41)
y = np.exp(np.sin(x))
fit, axs = plt.subplots(nrows=2, ncols=1, figsize=(14,7))
axs[0].set_title("basefmt='-',color='C2'")
axs[0] = axs[0].stem(x,y,linefmt='b--',basefmt='C2--')
axs[1].set_title("basefmt='-.', color='C1'")
axs[1] = axs[1].stem(x,y,linefmt='b-.',basefmt='C1-.')
plt.show()

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0.1,2 * np.pi, 41)
y = np.exp(np.sin(x))
fit, axs = plt.subplots(nrows=1, ncols=2, figsize=(14,7))
axs[0].set_title("bottom")
axs[0].stem(x,y,linefmt='grey',markerfmt='D',bottom=1.1)
axs[1].set_title('no bottom')
axs[1].stem(x,y,linefmt='grey',markerfmt='D')
plt.show()

import numpy as np
import matplotlib.pyplot as plt
# 生成模擬數據集
x=np.linspace(0,10,20)
y=np.random.randn(20)
# 繪制棉棒圖
markerline, stemlines, baseline = plt.stem(x,y,linefmt='-',markerfmt='o',basefmt='--',label='TestStem')
# 可單獨設置棉棒末端，棉棒連線以及基線的屬性
plt.setp(markerline, color='k')#將棉棒末端設置為黑色
plt.legend()
plt.show()