1Blurb:: 2Choose a trend function for a Gaussian process surrogate 3Description:: 4The only trend functions that are currently supported are polynomials. 5 6The trend function is selected using the \c trend 7keyword, with options \c constant, \c linear, or \c reduced_quadratic. 8The \c reduced_quadratic trend function includes the main 9effects, but not mixed/interaction terms. 10The Surfpack GP (See \ref model-surrogate-global-gaussian_process-surfpack) 11has the additional option of (a full) \c 12quadratic. 13 14Topics:: 15Examples:: 16Theory:: 17Faq:: 18See_Also:: 19