fig = plt.figure()
ax = fig.add_subplot(2, 1, 1)
ax.imshow(field1, cmap=plt.cm.YlGn, vmin=_min, vmax=_max)
ax.set_adjustable('box-forced')
ax.autoscale(False)
ax2 = fig.add_subplot(2, 1, 2)
ax2.set_adjustable('box-forced')
ax2.imshow(field2, cmap=plt.cm.YlGn, vmin=_min, vmax=_max)
ax2.autoscale(False)
plt.show()
Set two matplotlib imshow plots to have the same color map scale