水文分析与计算——缺失流量线性插值及相关分析//相关分析.hvoid XiangGuanFenXi(){using namespace std;const int M = 6209;//倚用系列长度const int Cha = 4380;//待插补系列长度double H[M] = {0},//水位Q[M] = {0},//流量AverageH = 0,AverageQ = 0,//均值a, b,//待定回归系数r = 0,//线性相关系数sigmaH =0,sigmaQ = 0;//均方差double ChaH[Cha],ChaQ[Cha];//待插系列ifstream infile;infile.open("infile_H_Q.txt");for(int i = 0; i < M; i++){infile>>H[i]>>Q[i];AverageH += H[i],AverageQ += Q[i];}infile.close();AverageH /= M,AverageQ /= M;for(int i = 0; i < M; i++){r += (H[i] - AverageH)*(Q[i] - AverageQ);sigmaH += pow(H[i] - AverageH, 2);sigmaQ += pow(Q[i] - AverageQ, 2);}r /= pow(sigmaH*sigmaQ, 0.5);sigmaH = pow(sigmaH/(M - 1), 0.5);sigmaQ = pow(sigmaQ/(M - 1), 0.5);b = r*sigmaQ/sigmaH;a = AverageQ - b*AverageH;cout<<"线性相关系数r = "<<r<<endl<<"流量Q倚水位H的回归系数估计值分别为："<<endl<<"a = "<<a<<endl<<"b = "<<b<<endl<<"需要进行插值请输入1，否则请输入0"<<endl;cin>>r;if(r == 1){ofstream outfile;outfile.open("outfile_ChaQ.txt");infile.open("infile_ChaH.txt");for(int i = 0; i < Cha; i++){infile>>ChaH[i];ChaQ[i] = a + b*ChaH[i];if(ChaQ[i] < 0) ChaQ[i] = 0;//流量不可能为负值outfile<<ChaQ[i]<<endl;}infile.close();outfile.close();}}
