问一维阵列距离矩阵的绘制

EN

import numpy as np
import matplotlib.pyplot as plt
R = np.array ([3.00, 2.50, 1.00, 3.3192, 2.383,  2.7128, 3.8662, 3.6724,   3.5112])

# Calculate the shape of the 2d array
n = int( np.sqrt( R.size ) )
C = R.reshape((n,n))

# Plot the matrix
plt.matshow(C,cmap="Reds")

ax = plt.gca()

# Set the plot labels
xlabels = ["B%d" % i for i in xrange(n+1)]
ylabels = ["A%d" % i for i in xrange(n+1)]
ax.set_xticklabels(xlabels)
ax.set_yticklabels(ylabels)

#Add text to the plot showing the values at that point
for i in xrange(n):
    for j in xrange(n):
        plt.text(j,i, C[i,j], horizontalalignment='center', verticalalignment='center')

plt.show()

import numpy as np
from matplotlib.pylab import *
R = np.array ([3.00, 2.50, 1.00, 3.3192, 2.383,  2.7128, 3.8662, 3.6724,   3.5112])
C = np.split(R, 3)
print(C)
matshow(C,cmap=cm.gray)
plt.show()