deriv_tests: Check whether non-linear least squares restricted MIDAS regression problem has converged
Description
Computes the gradient and hessian of the optimisation
function of restricted MIDAS regression and checks whether
the conditions of local optimum are met. Numerical
estimates are used.
Usage
deriv_tests(x, tol = 1e-06)
## S3 method for class 'midas_r':
deriv_tests(x, tol = 1e-06)