Python中的 Matplotlib.axes.Axes.stem()

Matplotlib是Python中的一个库，它是 NumPy 库的数值数学扩展。 Axes 类包含大部分图形元素：Axis、Tick、Line2D、Text、Polygon 等，并设置坐标系。 Axes 的实例通过回调属性支持回调。

matplotlib.axes.Axes.stem()函数

matplotlib 库的 axes 模块中的Axes.stem()函数用于创建茎图。

Syntax: Axes.stem(self, *args, linefmt=None, markerfmt=None, basefmt=None, bottom=0, label=None, use_line_collection=False, data=None)

Parameters: This method accept the following parameters that are described below:

x: This parameter is the sequence of x coordinates of the stems.
y: This parameter is the sequence of y coordinates of the stem heads.
linefmt: This parameter is the string defining the properties of the vertical lines.
markerfmt: This parameter is the string defining the properties of the markers at the stem heads.
basefmt: This parameter is the string defining the properties of the baseline.
bottom: This parameter is the y-position of the baseline.
label: This parameter is the label to use for the stems in legends.

Returns: This returns the following:

StemContainer: This returns the container which may be treated like a tuple (markerline, stemlines, baseline).

编程需要懂一点英语

下面的示例说明了 matplotlib.axes 中的 matplotlib.axes.Axes.broken_barh()函数：

示例 1：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
  
fig, ax = plt.subplots()
  
ax.stem([0.3, 1.5, 2.7], 
        [1, 3.6, 2.7], 
        label ="stem test")
  
ax.legend()
ax.set_title('matplotlib.axes.Axes.stem Example')
plt.show()

输出：

示例 2：

# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
  
x = np.linspace(0.1, 2 * np.pi, 41)
y = np.exp(np.sin(x))
  
fig, ax = plt.subplots()
  
ax.stem(x, y, linefmt ='grey', 
        markerfmt ='D', 
        bottom = 1.1, 
        use_line_collection = True)
  
ax.set_title('matplotlib.axes.Axes.stem Example')
plt.show()