import numpy as np

import matplotlib.pyplot as plt

def show_slice(Z, name):

Z = np.atleast_2d(Z)

rows,cols = Z.shape

fig = plt.figure(figsize=(cols,rows), dpi=72, frameon=False)

#ax = plt.subplot(111, frameon=False)

ax = plt.axes([0,0,1,1], frameon=False)

A = np.arange(rows*cols).reshape(rows,cols)

plt.imshow(Z, cmap='Purples', extent=[0,cols,0,rows],

vmin=0, vmax=max(1,Z.max()), interpolation='nearest',

origin='upper')

#plt.xticks(1.05+np.arange(cols-1),[]), plt.yticks(1+np.arange(rows-1),[])

plt.xticks([]), plt.yticks([])

#ax.grid(which='major', axis='x', linewidth=1.5, linestyle='-', color='w')

#ax.grid(which='major', axis='y', linewidth=1.5, linestyle='-', color='w')

#ax.tick_params(axis='x', colors='w')

#ax.tick_params(axis='y', colors='w')

plt.savefig('../figures/%s' % name, dpi=16)

#plt.show()

rows,cols = 5, 9

Z = np.array([0.,0.,0.,0.,0.,0.,0.,0.,0.])

Z += 0.1

show_slice(Z, 'create-list-1.png')

Z = np.zeros(cols)+.1

show_slice(Z, 'create-zeros-1.png')

Z = np.ones(cols)+.1

show_slice(Z, 'create-ones-1.png')

Z = np.arange(cols)

show_slice(Z, 'create-arange-1.png')

Z = np.random.uniform(0,1,cols)

show_slice(Z, 'create-uniform-1.png')

Z = np.zeros((rows,cols))+.1

show_slice(Z, 'create-zeros-2.png')

Z = np.ones((rows,cols))+.1

show_slice(Z, 'create-ones-2.png')

Z = np.array([[0.,0.,0.,0.,0.,0.,0.,0.,0.],

[0.,0.,0.,0.,0.,0.,0.,0.,0.],

[0.,0.,0.,0.,0.,0.,0.,0.,0.],

[0.,0.,0.,0.,0.,0.,0.,0.,0.],

[0.,0.,0.,0.,0.,0.,0.,0.,0.]])

Z += 0.1

show_slice(Z, 'create-list-2.png')

Z = np.arange(rows*cols).reshape(rows,cols)

show_slice(Z, 'create-arange-2.png')

Z = np.random.uniform(0,1,(rows,cols))

show_slice(Z, 'create-uniform-2.png')