如何在使用host_subplot時創建不同大小的子圖？

Question

這是我的previous question的後續行動。該問題的答案顯示了第二次使用host_subplot來生成第二個圖形的解決方案，爲方便起見，下面將複製該圖形。

我試圖使用this answer，但是在嘗試將gridspec_kw傳遞給host_subplot函數時遇到了錯誤Unknown property gridspec_kw。

當其中一個地塊還有一個雙Y軸使用host_subplot時，我怎樣才能獲得不同尺寸的子圖？

""" 
Parasite axis demo 

The following code is an example of a parasite axis. It aims to show a user how 
to plot multiple different values onto one single plot. Notice how in this 
example, par1 and par2 are both calling twinx meaning both are tied directly to 
the x-axis. From there, each of those two axis can behave separately from the 
each other, meaning they can take on separate values from themselves as well as 
the x-axis. 
""" 
from mpl_toolkits.axes_grid1 import host_subplot 
import mpl_toolkits.axisartist as AA 
import matplotlib.pyplot as plt 

host = host_subplot(211, axes_class=AA.Axes) 
plt.subplots_adjust(right=0.75) 

par1 = host.twinx() 
par2 = host.twinx() 

offset = 60 
new_fixed_axis = par2.get_grid_helper().new_fixed_axis 
par2.axis["right"] = new_fixed_axis(loc="right", 
            axes=par2, 
            offset=(offset, 0)) 

par2.axis["right"].toggle(all=True) 

host.set_xlim(0, 2) 
host.set_ylim(0, 2) 

host.set_xlabel("Distance") 
host.set_ylabel("Density") 
par1.set_ylabel("Temperature") 
par2.set_ylabel("Velocity") 

p1, = host.plot([0, 1, 2], [0, 1, 2], label="Density") 
p2, = par1.plot([0, 1, 2], [0, 3, 2], label="Temperature") 
p3, = par2.plot([0, 1, 2], [50, 30, 15], label="Velocity") 

par1.set_ylim(0, 4) 
par2.set_ylim(1, 65) 

host.legend() 

host.axis["left"].label.set_color(p1.get_color()) 
par1.axis["right"].label.set_color(p2.get_color()) 
par2.axis["right"].label.set_color(p3.get_color()) 

## How can I make this subplot only 1/3 as tall as the first one? 
host2 = host_subplot(212, axes_class=AA.Axes, sharex=host) 
host2.plot([0,1,2], [5,6,7]) 
host2.set_title('Sharing X axis') 

plt.draw() 
plt.show() 

Answer 1

看來，這可以通過與GridSpec更換的host_subplot的第一個參數使用accepted answer到鏈接的問題來進行。下面是添加和更改的行。你可以這樣做

from matplotlib import gridspec 

# Two rows, one column, with height ratio of 4:1 between the top and bottom graph. 
gs = gridspec.GridSpec(2, 1, height_ratios=[4, 1]) 

host = host_subplot(gs[0], axes_class=AA.Axes) 
host2 = host_subplot(gs[1], axes_class=AA.Axes, sharex=host) 

Answer 2

一種方式是通過改變兩個調用host_subplot()的行數。對於3：1高度差：

host = host_subplot(211, axes_class=AA.Axes) 
host2 = host_subplot(614, axes_class=AA.Axes, sharex=host) 

第一次調用將圖形分成2行並選擇上半部分的軸。第二次調用將圖像分成6行並選擇第四行中的子圖。

H/T：https://stackoverflow.com/a/3339129/7517724