static string
rank_correlation_computation(const Vectors& input, int icorrel_type, const string &filename)
{
StatError error;
std::stringstream os;
bool ret;
correlation_type correl_type = correlation_type(icorrel_type);
ret = input.rank_correlation_computation(error, os, correl_type, filename.c_str());
//std::cout << os.str()<<endl;
return os.str();
}
