To say the conclusion first, I want to check shape of variable 'X' that is
'sequences' parameter in theano.tensor.scan function
scan function looks like this :
def forward(self, X):
"""
X.shape = (timesteps, dim)
X.shape = (n_samples, timesteps, dim)
"""
print('X shape: ', X.shape)
states, updates = theano.scan(
fn=self.step,
sequences=[X],
outputs_info=[self.h_tm1, self.c_tm1],
non_sequences=[
self.Ui, self.Wi, self.bi,
self.Uf, self.Wf, self.bf,
self.Uo, self.Wo, self.bo,
self.Ug, self.Wg, self.bg
]
)
print('scan end')
updates = [(self.h_tm1, states[0][-1]), (self.c_tm1, states[1][-1])]
return states, updates
___________________________________
and step function looks like this :
def step(
x_t, h_tm1, c_tm1,
Ui, Wi, bi, Uf, Wf, bf,
Uo, Wo, bo, Ug, Wg, bg
):
print('x_t.shape : ', x_t.shape)
"""
x_t.shape = (timestep=1, dim)
x_t.shape = (n_samples, timestep=1, dim)
"""
i_t = T.nnet.sigmoid(T.dot(x_t, Ui) + T.dot(h_tm1, Wi) + bi)
f_t = T.nnet.sigmoid(T.dot(x_t, Uf)+T.dot(h_tm1, Wf)+bf)
o_t = T.nnet.sigmoid(T.dot(x_t, Uo) + T.dot(h_tm1, Wo) + bo)
g_t = T.tanh(T.dot(x_t, Ug) + T.dot(h_tm1, Wg) + bg)
c_t = c_tm1 * f_t + g_t * i_t
h_t = T.tanh(c_t) * o_t
return h_t, c_t
The problem is that X.shape is maybe (26,10,7002). But this is just my
assumption (I don't know how to check it ). and x_t is maybe (10,7002).
But error occured when compute 'f_t = T.nnet.sigmoid(T.dot(x_t,
Uf)+T.dot(h_tm1, Wf)+bf)' . Maybe because of shape mismatch about elem_wise
Once theano.function is begin, it is hard to check shape of numpy array(or
tensorVariable?).
I coded ' print('x_t.shape : ', x_t.shape) in start line of step
function. But it didn't work.
Some people say you should use 'printing.Print function'. But specifically
want to method writing the code.
Thank you for reading this question. Truly grateful.
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