功能: 创建矩阵点加层

格式:
NetCreateDotAddLayer(x, m)

x : 输入层
m : 创建层节点数

说明:
1. 本函数本质上是快速创建一个"w*x + b"层
2. 在创建过程中程序内部自动创建w变量,即省略了一些步骤
3. 本函数等价于如下代码,然后返回输出层y
n = {NetLayerGetSize<矩阵运算\NetLayerGetSize>}(x);
w = {NetCreateVar<矩阵运算\NetCreateVar>}(m, n);
b = {NetCreateVar<矩阵运算\NetCreateVar>}(m);
g = {NetCreateLayer<矩阵运算\NetCreateLayer>}("w*x", m);
y = {NetCreateLayer<矩阵运算\NetCreateLayer>}("x+a", m);
{NetLayerSetInput1<矩阵运算\NetLayerSetInput1>}(g, x);
{NetLayerSetVar<矩阵运算\NetLayerSetVar>}(g, w);
{NetLayerSetInput1<矩阵运算\NetLayerSetInput1>}(y, g);
{NetLayerSetVar<矩阵运算\NetLayerSetVar>}(y, b);

例子:
inputlayer = {NetCreateLayer<矩阵运算\NetCreateLayer>}("", 81);//定义一个81个节点的输入层
outlayer = NetCreateDotAddLayer(inputlayer, 2)//执行完毕创建一个点加层