从给定数据集生成热图

Question

在下面的热图中，我想从0到25开始y值。现在它处于相反的方向。

import matplotlib.pyplot as plt 
import numpy as np 
import matplotlib 
import matplotlib 
matplotlib.rc('text', usetex=True) 
matplotlib.rcParams['text.latex.preamble']=[r"\usepackage{amsmath}"] 
a=[] 
for i in range(25): 
    b=[] 
    for j in range(25): 
     b.append(i*j) 
    a.append(b)  
fig = plt.figure(figsize=(8,5.00)) 
plt.imshow(a, interpolation='nearest') 
plt.colorbar() 
ax = fig.add_subplot(1,1,1) 
major_ticks = np.arange(0, 24, 2)            
minor_ticks = np.arange(0, 24, 1)            
ax.set_xticks(major_ticks)              
ax.set_xticks(minor_ticks, minor=True) 
plt.xlabel(r'$\pmb{u} \ \longrightarrow$') 
plt.ylabel(r'$\pmb{v} \ \longrightarrow$') 
plt.show() 
fig.savefig('abc.eps', bbox_inches = 'tight', 
    pad_inches = 0.2) 

Answer 1

需要包括原点= '下'