def test_layer():
X, Y = [], []
for i in range(1000):
x = np.random.uniform(-3,3)
X.append(np.array([x]))
Y.append(-np.sin(x)+np.random.normal(0,0.1))
X2, Y2 = [], []
for i in range(1000):
x = np.random.uniform(-3,3)
X2.append(np.array([x]))
Y2.append(-np.sin(x)+np.random.normal(0,0.1))
l1 = layer(dim=(1,8), f=np.tanh, df=lambda x: (1.0-np.square(x)),
drp_rate=0.0, lrate=3.0, c=1)
l2 = layer(dim=(8,1), f=lambda x: x, df=lambda x: 1.0,
drp_rate=0.5, lrate=3.0, c=1)
Y_hat = []
for j in range(len(X)):
z1, v1, drp1 = l1.forward(X[j])
z2, v2, drp2 = l2.forward(z1)
dE_dZ = z2-Y[j]
d1 = l2.backward(dE_dZ, z2, drp2)
l1.update(d1, z1, v1)
l2.update(dE_dZ, z2, v2)
for j in range(len(X2)):
z1 = l1.forward(X2[j], train=False)
z2 = l2.forward(z1, train=False)
Y_hat.append(z2)
plt.scatter([x2[0] for x2 in X2],Y2, color='blue')
plt.scatter([x2[0] for x2 in X2],Y_hat, color='red')
def test_word_conv_pool():
l1 = word_vec(word_dim=2)
l2 = conv_layer(word_dim=2, K=(4,0), lrate=1.0, c=20)
l3 = pool_layer()
l4 = layer(dim=(4,1),lrate=1.0,f=lambda x: x,df=lambda x: 1,
drp_rate=0.0, c=30)
l5 = layer(dim=(1,1),lrate=1.0,f=np.tanh, df=lambda x: (1-np.square(x)),
drp_rate=0.5, c=30)
h = hinge_loss(m=1)
positive_words = ['happy','fantastic','great','awesome',':)','faboulous','animated',
'excited','bombastic','amazing','good']
negative_words = ['sad','terrible', 'aweful', 'grief',':(','malign',
'depressed', 'tear', 'cry']
neutral_words = ['neutral', 'white', 'normal', 'jump', 'water']
def f(words1, words2):
for _ in range(5):
for p_word in words1:
for n_word in words2:
#Forward pass
z1_p, p_word = l1.forward(p_word)
z2_p = l2.forward(z1_p)
z3_p, z3_ind_max_p = l3.forward(z2_p)
z4_p, v4_p, drp4_p = l4.forward(z3_p)
z5_p, v5_p, drp5_p = l5.forward(z4_p)
z1_n, n_word = l1.forward(n_word)
z2_n = l2.forward(z1_n)
z3_n, z3_ind_max_n = l3.forward(z2_n)
z4_n, v4_n, drp4_n = l4.forward(z3_n)
z5_n, v5_n, drp5_n = l5.forward(z4_n)
#Hinge loss
Z = h.forward(z4_p[0], z4_n[0])
dE_dZ = h.backward(Z)
#Backward deltas
d1_p = l5.backward([dE_dZ[0]], z5_p, drp5_p)
d2_p = l4.backward([dE_dZ[0]], z4_p, drp4_p)
d3_p = l3.backward(d2_p, z3_ind_max_p, z2_p)
d4_p = l2.backward(d3_p,z1_p)
d1_n = l5.backward([dE_dZ[1]], z5_n, drp5_n)
d2_n = l4.backward([dE_dZ[1]], z4_n, drp4_n)
d3_n = l3.backward(d2_n, z3_ind_max_n, z2_n)
d4_n = l2.backward(d3_n,z1_n)
#Update learned parameters
l5.update([dE_dZ[0]], z5_p, v5_p)
l4.update([dE_dZ[0]], z4_p, v4_p)
l2.update(d3_p, z1_p)
l1.update(d4_p, p_word)
l5.update([dE_dZ[1]], z5_n, v5_n)
l4.update([dE_dZ[1]], z4_n, v4_n)
l2.update(d3_n, z1_n)
l1.update(d4_n, n_word)
def plot_word_vecs(words, color):
Px, Py = [l1.W[word][0] for word in words], [l1.W[word][1] for word in words]
plt.scatter(Px,Py, color=color)
f(positive_words, negative_words)
f(positive_words, neutral_words)
f(negative_words, neutral_words)
plot_word_vecs(positive_words, 'blue')
plot_word_vecs(negative_words, 'red')
plot_word_vecs(neutral_words, 'green')