How to read/write a PCA object from/to a cv::FileStorage

Following is a fixed version of http://answers.opencv.org/question/4899/how-to-readwrite-a-pca-object-fromto-a

void save(const string file_name, cv::PCA &pca_)

{

    cv::FileStorage fs(file_name, cv::FileStorage::WRITE);

    fs << "mean" << pca_.mean;

    fs << "e_vectors" << pca_.eigenvectors;

    fs << "e_values" << pca_.eigenvalues;

    fs.release();

}

void load(const string file_name,cv::PCA &pca_)

{

    cv::FileStorage fs(file_name,cv::FileStorage::READ);

    fs["mean"] >> pca_.mean ;

    fs["e_vectors"] >> pca_.eigenvectors ;

    fs["e_values"] >> pca_.eigenvalues ;

    fs.release();

}