Theano - Matrices Sigmoidal Transfer

Theano - Matrices Sigmoidal Transfer.py

from theano import function
from theano import tensor as T

# (theano Tutorial)[http://deeplearning.net/software/theano/tutorial/examples.html]

# create a symbolic matrix
x = T.dmatrix('x')

# Method 1
# symbolic function
out = 1 / (1 + T.exp(-x))
f = function([x], out)

print f([[0, 1], [-1, -2]])


# Method 1
s2 = (1 + T.tanh(x / 2)) / 2
logistic2 = function([x], s2)
print logistic2([[0, 1], [-1, -2]])