Visualization of matrix created by numpy

#coding:utf-8
from pylab import *
import numpy

matrixW = numpy.zeros( (6, 11) )
    
#Enter a value in matrixW as appropriate
    
#Visualization
#figure(1)
im = imshow(matrixW, interpolation='nearest') # origin='lower'
title('$W_j$')
colorbar(im) #Color bar showing the correspondence between colors and values
grid(True)
gray() #Blank, gray(), hot()The color changes depending on
show()

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