def test_update_error(self):
# upper_node1.error = .8
# upper_node2.error = .4
# conn1 weight = .3
# conn2 weight = .7
self.node.node_type = NODE_OUTPUT
self.node.set_activation_type(ACTIVATION_SIGMOID)
halt_on_extremes = True
self.node._value = .4
self.node.target = .55
self.node.error = 0.0
self.node.update_error(halt_on_extremes)
self.assertAlmostEqual(.55 - sigmoid(.4), self.node.error)
#
self.node.node_type = NODE_HIDDEN
self.node.set_activation_type(ACTIVATION_SIGMOID)
halt_on_extremes = True
self.node._value = .4
self.node.error = .55
self.node.update_error(halt_on_extremes)
self.assertAlmostEqual(.55 * sigmoid_derivative(sigmoid(.4)),
self.node.error)
def test_error_func(self):
self.node.set_activation_type(ACTIVATION_SIGMOID)
self.assertAlmostEqual(sigmoid_derivative(.2),
self.node.error_func(.2))
