init
========

.. js:function:: FullyConnectedLayer.init(prev_layer) 

    初期処理

    :param Layer prev_layer: 直前のレイヤー 

ソース
^^^^^^

.. code-block:: js

            init(prev_layer) {
                super.init(prev_layer);
    
                this.bias = random.randn(this.unitSize, 1);
                this.weight = random.randn(this.unitSize, this.prevLayer.unitSize);
    
                if(this.activationFunction == ActivationFunction.ReLU){
                    var sd = Math.sqrt(2.0 / prev_layer.unitSize);
                    for(var i = 0; i < this.weight.dt.length; i++){
                        this.weight.dt[i] *= sd;
                    }
                }
    
                this.deltaWeight = new ArrayView(this.unitSize, this.prevLayer.unitSize);
            }