Update comment

WardBrian · WardBrian · commit 669f352635f6 · 2022-08-03T12:12:37.000-04:00
diff --git a/stan/math/rev/fun/fft.hpp b/stan/math/rev/fun/fft.hpp
@@ -111,7 +111,7 @@ inline plain_type_t<V> inv_fft(const V& y) {
  *
  * The adjoint computation is given by
  * ```
- * adjoint(x) += size(y) * inv_fft(adjoint(y))
+ * adjoint(x) += size(y) * inv_fft2(adjoint(y))
  * ```
  *
  * @tparam M type of complex matrix argument
@@ -143,7 +143,7 @@ inline plain_type_t<M> fft2(const M& x) {
  *
  * The adjoint computation is given by
  * ```
- * adjoint(y) += (1 / size(x)) * fft(adjoint(x))
+ * adjoint(y) += (1 / size(x)) * fft2(adjoint(x))
  * ```
  *
  * @tparam M type of complex matrix argument

Original file line number	Diff line number	Diff line change
`@@ -111,7 +111,7 @@ inline plain_type_t<V> inv_fft(const V& y) {`
`111`	`111`	`*`
`112`	`112`	`* The adjoint computation is given by`
`113`	`113`	* ```
`114`		`- * adjoint(x) += size(y) * inv_fft(adjoint(y))`
	`114`	`+ * adjoint(x) += size(y) * inv_fft2(adjoint(y))`
`115`	`115`	* ```
`116`	`116`	`*`
`117`	`117`	`* @tparam M type of complex matrix argument`
`@@ -143,7 +143,7 @@ inline plain_type_t<M> fft2(const M& x) {`
`143`	`143`	`*`
`144`	`144`	`* The adjoint computation is given by`
`145`	`145`	* ```
`146`		`- * adjoint(y) += (1 / size(x)) * fft(adjoint(x))`
	`146`	`+ * adjoint(y) += (1 / size(x)) * fft2(adjoint(x))`
`147`	`147`	* ```
`148`	`148`	`*`
`149`	`149`	`* @tparam M type of complex matrix argument`