bvtcdf
              Bivariate Student’s t cumulative distribution function (CDF).
 p = bvtcdf (x, rho, df) will compute the
 bivariate student’s t cumulative distribution function of x, which must
 be an  matrix, given a correlation coefficient rho, which
 must be a scalar, and df degrees of freedom, which can be a scalar or a
 vector of positive numbers commensurate with x.
 Tol is the tolerance for numerical integration and by default
 Tol = 1e-8.
See also: mvtcdf
Source Code: bvtcdf