text: import scipy.io as sio
  import matplotlib.pyplot as plt
  
  print 'Loading Matlab data.'
  mat = sio.loadmat('train_32x32.mat')
  data = mat['X']
  label = mat['y']
  for i in range(100):
      plt.subplot(10, 10, i+1)
      plt.title(label[i][0])
      plt.imshow(data[..., i])
      plt.axis('off')
  plt.show()
  