Python中的 Matplotlib.pyplot.subplot2grid()

Matplotlib 是Python中用于数组二维图的惊人可视化库。 Matplotlib 是一个基于 NumPy 数组构建的多平台数据可视化库，旨在与更广泛的 SciPy 堆栈配合使用。

Matplotlib.pyplot.subplot2grid()

Matplotlib.pyplot.subplot2grid()函数在网格内的指定位置创建轴对象时提供了额外的灵活性。它还有助于跨越多行或多列的轴对象。简而言之，此函数用于在同一个图形中创建多个图表。它是一个子图布局管理器。

Syntax : Plt.subplot2grid(shape, location, rowspan, colspan)

Parameters :

• shape: As the name suggests it is used to define the shape of the grid to be plotted within the graph. It is a required argument and is generally passed in as a list or tuple of two numbers which are responsible for the layout of the grid with the first number being the number of rows and the second number as the number of columns.
• location (loc): This is the second mandatory argument that this function takes. Similar to the shape argument it is also a required argument and is generally passed in as a list or tuple of two numbers. It is used for specifying the row and column number to place the sub-plot. It is also important to note that the indexes start from 0. So (0, 0) would be the cell in the first row and the first column of the grid.
• rowspan: Once the grid layout is set and the starting index is decided using location(loc) one can expand the selection to take up more rows with this argument. This is an optional parameter and has a default value of 1.
• colspan: Similar to rowspan it is used to expand the selection to take up more columns. It is also an optional parameter with default value of 1.

示例 1：

import matplotlib.pyplot as plt
  
  
fig = plt.figure()
  
axes1 = plt.subplot2grid((4, 4), (0, 0),
                         colspan = 4)
  
axes2 = plt.subplot2grid((4, 4), (1, 0),
                         colspan = 3)
  
axes3 = plt.subplot2grid((4, 4), (1, 2), 
                         rowspan = 3)
  
axes4 = plt.subplot2grid((4, 4), (2, 0))
axes5 = plt.subplot2grid((4, 4), (2, 1))
  
fig.tight_layout()

输出 ：

示例 2：

import random
import matplotlib.pyplot as plt
from matplotlib import style
  
  
style.use('fivethirtyeight')
  
fig = plt.figure()
  
  
# helper function to plot the lines
def helper():
      
    xs = []
    ys = []
  
    for i in range(10):
        x = i
        y = random.randrange(10)
  
        xs.append(x)
        ys.append(y)
    return xs, ys
  
axes1 = plt.subplot2grid ((7, 1), (0, 0),
                          rowspan = 2, 
                          colspan = 1)
  
axes2 = plt.subplot2grid ((7, 1), (2, 0),
                          rowspan = 2,
                          colspan = 1)
  
axes3 = plt.subplot2grid ((7, 1), (4, 0), 
                          rowspan = 2, 
                          colspan = 1)
  
x, y = helper()
axes1.plot(x, y)
  
x, y = helper()
axes2.plot(x, y)
  
x, y = helper()
axes3.plot(x, y)

输出：