这是我的位置：
我想将其更改为这种方式：
代码如下所示：
D_max_ratio=numpy.divide(D_max_Nobs,D_max_1000)
fig = plt.figure()
plt.set_cmap('jet_r')
x_axis = ['100', '', '300', '',"500","","700","","900","","1100","","1300","","1500"]
y_axis = ['10', '20', '30', '40',"50","60","70","80","90","100"]
ax = fig.add_subplot(111)
cax = ax.matshow(D_max_ratio)
ax.xaxis.set_ticks_position('bottom')
ax.set_xticks(numpy.arange(15))
ax.set_yticks(numpy.arange(10))
ax.set_xticklabels(x_axis)
ax.set_yticklabels(y_axis)
plt.xlabel('f/MHz')
plt.ylabel('$N_{obs}^{R}$')
cb=fig.colorbar(cax)
最佳答案
您要的是一个寄生轴，如此example所示，对于您的情况，
from mpl_toolkits.axes_grid1 import host_subplot
import mpl_toolkits.axisartist as AA
import matplotlib.pyplot as plt
import numpy as np
#Setup a host axis
host = host_subplot(111, axes_class=AA.Axes)
plt.subplots_adjust(bottom=0.2)
#Add twin y axis with offset from bottom and hide top axis
par = host.twiny()
offset = -30
new_fixed_axis = host.get_grid_helper().new_fixed_axis
par.axis["bottom"] = new_fixed_axis(loc="bottom",
axes=par,
offset=(0, offset))
par.axis["top"].set_visible(False)
# Plot data and add main axis labels/limits
host.imshow(np.random.rand(128,1600))
host.set_xlabel("f/MHz")
host.set_xlim((0,1600))
plt.axis("tight")
#Set limits of parasite axis
#(note this axis is not attached to
# an actual plot so changes nothing)
par.set_xlabel("Ka")
par.set_xlim((0,15.71))
plt.draw()
plt.show()
看起来像