zoukankan      html  css  js  c++  java
  • PCA降维

    http://blog.csdn.net/a784763307/article/details/17289317

    这篇比较棒


    openCV版

    void PrintMatrix(CvMat *Matrix,int Rows,int Cols)  
    {  
        for(int i=0;i<Rows;i++)  
        {  
            for(int j=0;j<Cols;j++)  
            {  
                printf("%.2f ",cvGet2D(Matrix,i,j).val[0]);  
            }  
            printf("
    ");  
        }  
    }  
    int main()
    {
        float Coordinates[20]={1.5,2.3,  
                                     3.0,1.7,  
                                     1.2,2.9,  
                                     2.1,2.2,  
                                     3.1,3.1,  
                                     1.3,2.7,  
                                     2.0,1.7,  
                                     1.0,2.0,  
                                     0.5,0.6,  
                                     1.0,0.9};  
        CvMat *Vector1;  
        CvMat *AvgVector;  
        CvMat *EigenValue_Row;  
        CvMat *EigenVector;  
      
        Vector1=cvCreateMat(10,2,CV_32FC1);  
        cvSetData(Vector1,Coordinates,Vector1->step);  
        AvgVector=cvCreateMat(1,2,CV_32FC1);  
        EigenValue_Row=cvCreateMat(2,1,CV_32FC1);  
        EigenVector=cvCreateMat(2,2,CV_32FC1);  
      
        cvCalcPCA(Vector1,AvgVector,EigenValue_Row,EigenVector,CV_PCA_DATA_AS_ROW);  
      
        printf("Original Data:
    ");  
        PrintMatrix(Vector1,10,2);  
      
        printf("==========
    ");  
        PrintMatrix(AvgVector,1,2);  
      
        printf("
    Eigne Value:
    ");  
        PrintMatrix(EigenValue_Row,2,1);  
      
        printf("
    Eigne Vector:
    ");   //每一行是一个特征向量。
        PrintMatrix(EigenVector,2,2);  
      cout<<"******************************"<<endl;
    
    
    
    system("pause");
    return 0;
    
    }
  • 相关阅读:
    随笔
    打破生活的套牢
    健忘是种美德
    【转贴】怎样冒充古典高手!
    php数组中删除元素
    JS 总结
    ubuntu apache rewrite
    JS 预览超级大图
    UBUNTU 安装SVN
    Yahoo14条前端优化规则
  • 原文地址:https://www.cnblogs.com/karcylee/p/4026012.html
Copyright © 2011-2022 走看看