# 热力图:
# imshow(X, cmap=None, norm=None, aspect=None, interpolation=None, alpha=None, vmin=None, vmax=None, origin=None, extent=None, shape=None, filternorm=1, filterrad=4.0, imlim=None, resample=None, url=None, hold=None, data=None, **kwargs)
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['Arial Unicode MS']
x = [[1, 2], [3, 4]]
plt.subplot(231)
im = plt.imshow(x, interpolation='nearest', cmap='hot')
# imshow参数linewidth设置切分线宽 linecolor设置切分线颜色
plt.colorbar(im, shrink=0.5)
plt.axis('off')
plt.title('原始')
plt.subplot(232)
im = plt.imshow(x, cmap='gray') # 灰度
plt.colorbar(im, shrink=0.5)
plt.axis('off')
plt.title('灰度')
plt.subplot(233)
im = plt.imshow(x, cmap='spring') # 春
plt.colorbar(im, shrink=0.5)
plt.axis('off')
plt.title('春')
plt.subplot(234)
im = plt.imshow(x, cmap='summer') # 夏
plt.colorbar(im, shrink=0.5)
plt.axis('off')
plt.title('夏')
plt.subplot(235)
im = plt.imshow(x, cmap='autumn') # 秋
plt.colorbar(im, shrink=0.5)
plt.axis('off')
plt.title('秋')
plt.subplot(236)
im = plt.imshow(x, cmap='winter') # 冬
plt.colorbar(im, shrink=0.5)
plt.axis('off')
plt.title('冬')
plt.show()