Function Parameters CvRTrees :: train () - OpenCV / C ++

Hello

I need to use the CvRTrees::train() function of OpenCV, but I do not quite understand the parameters used. To help, the site has no documentation on the parameters of this function.

The function specification is:

bool CvDTree::train(const Mat& trainData, 
                    int tflag, 
                    const Mat& responses, 
                    const Mat& varIdx=Mat(), 
                    const Mat& sampleIdx=Mat(), 
                    const Mat& varType=Mat(), 
                    const Mat& missingDataMask=Mat(), 
                    CvDTreeParams params=CvDTreeParams() )

Thank you!