def setActivations(self, value):
        """
        Sets all activations to the value of the argument. Value should be in the range [0,1].
        """
        #if self.verify and not self.activationSet == 0:
        #    raise LayerError, \
        #          ('Activation flag not reset. Activations may have been set multiple times without any intervening call to propagate().', self.activationSet)
        Numeric.put(self.activation, Numeric.arange(len(self.activation)), value)
        self.activationSet = 1