Merge pull request #3265 from stan-dev/fix-grad_reg_lower_inc_gamma

syclik · web-flow · commit 5df6fc50b02b · 2025-12-23T14:43:14.000-05:00
fix incorrect order of inputs within `grad_reg_lower_inc_gamma`
diff --git a/stan/math/prim/fun/grad_reg_lower_inc_gamma.hpp b/stan/math/prim/fun/grad_reg_lower_inc_gamma.hpp
@@ -133,7 +133,7 @@ inline return_type_t<T1, T2> grad_reg_lower_inc_gamma(const T1& a, const T2& z,
                   + 60 * value_of_rec(z))) {
     T1 tg = tgamma(a);
     T1 dig = digamma(a);
-    return -grad_reg_inc_gamma(a, z, tg, dig, max_steps, precision);
+    return -grad_reg_inc_gamma(a, z, tg, dig, precision, max_steps);
   }
 
   T2 log_z = log(z);

Original file line number	Diff line number	Diff line change
`@@ -133,7 +133,7 @@ inline return_type_t<T1, T2> grad_reg_lower_inc_gamma(const T1& a, const T2& z,`
`133`	`133`	`+ 60 * value_of_rec(z))) {`
`134`	`134`	`T1 tg = tgamma(a);`
`135`	`135`	`T1 dig = digamma(a);`
`136`		`- return -grad_reg_inc_gamma(a, z, tg, dig, max_steps, precision);`
	`136`	`+ return -grad_reg_inc_gamma(a, z, tg, dig, precision, max_steps);`
`137`	`137`	`}`
`138`	`138`
`139`	`139`	`T2 log_z = log(z);`