From 457b02c61a2f3cd353d2997929b67a3ef890bf60 Mon Sep 17 00:00:00 2001
From: Yao Xiao <108576690+Charlie-XIAO@users.noreply.github.com>
Date: Tue, 26 Sep 2023 23:07:01 +0800
Subject: [PATCH] DOC fix return type of `make_sparse_spd_matrix` (#27472)

---
 sklearn/datasets/_samples_generator.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sklearn/datasets/_samples_generator.py b/sklearn/datasets/_samples_generator.py
index 1fbb0af300bae..181bf9a997921 100644
--- a/sklearn/datasets/_samples_generator.py
+++ b/sklearn/datasets/_samples_generator.py
@@ -1627,8 +1627,9 @@ def make_sparse_spd_matrix(
 
     Returns
     -------
-    prec : sparse matrix of shape (dim, dim)
-        The generated matrix.
+    prec : ndarray or sparse matrix of shape (dim, dim)
+        The generated matrix. If ``sparse_format=None``, this would be an ndarray.
+        Otherwise, this will be a sparse matrix of the specified format.
 
     See Also
     --------