1[section:gamma_derivatives Derivative of the Incomplete Gamma Function] 2 3[h4 Synopsis] 4 5`` 6#include <boost/math/special_functions/gamma.hpp> 7`` 8 9 namespace boost{ namespace math{ 10 11 template <class T1, class T2> 12 ``__sf_result`` gamma_p_derivative(T1 a, T2 x); 13 14 template <class T1, class T2, class ``__Policy``> 15 ``__sf_result`` gamma_p_derivative(T1 a, T2 x, const ``__Policy``&); 16 17 }} // namespaces 18 19[h4 Description] 20 21This function find some uses in statistical distributions: it 22implements the partial derivative with respect to /x/ of the incomplete 23gamma function. 24 25[equation derivative1] 26 27[optional_policy] 28 29Note that the derivative of the function __gamma_q can be obtained by negating 30the result of this function. 31 32The return type of this function is computed using the __arg_promotion_rules 33when T1 and T2 are different types, otherwise the return type is simply T1. 34 35[h4 Accuracy] 36 37Almost identical to the incomplete gamma function __gamma_p: refer to 38the documentation for that function for more information. 39 40[h4 Implementation] 41 42This function just expose some of the internals of the incomplete 43gamma function __gamma_p: refer to the documentation for that function 44for more information. 45 46[endsect] [/section Derivative of the Incomplete Gamma Functions] 47[/ 48 Copyright 2006 John Maddock and Paul A. Bristow. 49 Distributed under the Boost Software License, Version 1.0. 50 (See accompanying file LICENSE_1_0.txt or copy at 51 http://www.boost.org/LICENSE_1_0.txt). 52] 53 54 55