class Covariance {

    public RealMatrix getCovarianceMatrix() {
        return covarianceMatrix;
    }

    public  Covariance();
    public  Covariance(double[][] data, boolean biasCorrected);
    public  Covariance(double[][] data);
    public  Covariance(RealMatrix matrix, boolean biasCorrected);
    public  Covariance(RealMatrix matrix);

}