[MATLAB]在C#中引用MATLAB函数

环境：VS2017+MATLAB R2017a

①打开上次我们生成的BPClass.cs文件（目录：~//bin/BP/for_testing），得在C#程序中引用生成的dll文件（目录：~//bin/BP/for_redistribution_files_only）

 ②Methods里面写了调用方法，并给出了详尽的注释（这里的numArgsOut是输出参数的数量，可以看注释）

/// 

    /// Provides the standard 7-input MWArray interface to the BP MATLAB function.
    /// 
    /// 
    /// M-Documentation:
    /// 以下六行是BP网络最核心的程序
    /// 他们是权值（阈值）依据能量函数负梯度下降原理所作的每一步动态调整量
    /// 
    /// The number of output arguments to return.
    /// Input argument #1
    /// Input argument #2
    /// Input argument #3
    /// Input argument #4
    /// Input argument #5
    /// Input argument #6
    /// Input argument #7
    /// An Array of length "numArgsOut" containing the output
    /// arguments.
    ///
    public MWArray[] BP(int numArgsOut, MWArray gdp, MWArray steelProduction, MWArray 
                  autoProduction, MWArray highwayMileage, MWArray outputAmount, MWArray 
                  outputMoney, MWArray forecast)
    {
      return mcr.EvaluateFunction(numArgsOut, "BP", gdp, steelProduction, autoProduction, highwayMileage, outputAmount, outputMoney, forecast);
    }

      因为MATLAB中定义的函数是这样子的：

function [输出变量] = 函数名称(输入变量）
function ForecastResult=BP(gdp,steelProduction,autoProduction,highwayMileage,outputAmount,outputMoney,forecast)

      所以我是这样调用的：

for (int q = 0; q < 20; q++)
                {
                    gdpPre[q] = arr[q, 0];
                    steelProductionPre[q] = arr[q, 1];
                    autoProductionPre[q] = arr[q, 2];
                    highwayMileagePre[q] = arr[q, 3];
                    outputAmountPre[q] = arr[q, 4];
                    outputMoneyPre[q] = arr[q, 5];
                }
                MWNumericArray gdp = gdpPre;
                MWNumericArray steelProduction = steelProductionPre;
                MWNumericArray autoProduction = autoProductionPre;
                MWNumericArray highwayMileage = highwayMileagePre;
                MWNumericArray outputAmount = outputAmountPre;
                MWNumericArray outputMoney = outputMoneyPre;
                MWNumericArray forecast = new MWNumericArray(4, 1, new double[] { Convert.ToDouble(GDPtextBox.Text.Trim()), Convert.ToDouble(steelProductiontextBox.Text.Trim()), Convert.ToDouble(autoProductiontextBox.Text.Trim()), Convert.ToDouble(highwayMileagetextBox.Text.Trim()) });
                BP.BPClass function = new BP.BPClass();
                MWArray[] result = function.BP(1, (MWArray)gdp, (MWArray)steelProduction, (MWArray)autoProduction, (MWArray)highwayMileage, (MWArray)outputAmount, (MWArray)outputMoney, (MWArray)forecast);
                MWNumericArray x = (MWNumericArray)result[0];
                double[,] y = new double[1, 2];
                y = (double[,])x.ToArray(MWArrayComponent.Real);
                MessageBox.Show("预测销售数量:" + Convert.ToDouble(y[0, 0].ToString()) + "万件,预测销售利润:" + Convert.ToDouble(y[0, 1].ToString()) + "万元.", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);