How can I display a np.array with pylab.imshow()

Question

The np.array that results from this loop has 4383 lines and 6 columns. I have tried without success to use pylab.imshow() from matplotlib(pylab) to display the array.

The objective is to create an image of the array, in which the colors gradient represent the magnitude of the array values.

Each row of the array represents the variation in depth of a lake temperature in each day (4383 days). Thus the objective is to find differences in lake temperatures in depth and with time.

TempLake=np.zeros((N+1,Nlayers))
TempLake[0]=T0

Q=np.zeros(N+1)
Q[0]=0.0
for i in xrange(N):
    Q[i+1]=Qn(HSR[i],TD[i],FW[i],TempLake[i][0])
    TempLake[i+1]=main_loop(Z,z,Areat0,Areat1,TempLake[i],wind[i],Q[i],Q[i+1])
    
np.savetxt('test.out', TempLake, delimiter=',')
np.savetxt('test1.out', Q, delimiter=',')

pylab.imshow(TempLake)
pylab.show()

Answer 1

You can use imshow as follows:

import pylab as plt
import numpy as np


Z=np.array(((1,2,3,4,5),(4,5,6,7,8),(7,8,9,10,11)))
im = plt.imshow(Z, cmap='hot')
plt.colorbar(im, orientation='horizontal')
plt.show()

In your case can you check the output of TempLake.