diff --git a/lib/node_modules/@stdlib/stats/incr/covmat/README.md b/lib/node_modules/@stdlib/stats/incr/covmat/README.md
index 27a0121630ec..4ff4d50d0f5f 100644
--- a/lib/node_modules/@stdlib/stats/incr/covmat/README.md
+++ b/lib/node_modules/@stdlib/stats/incr/covmat/README.md
@@ -160,6 +160,10 @@ out = accumulator();
 
 <section class="notes">
 
+## Notes
+
+-   Input values are **not** type checked. If provided `NaN` or a value which, when used in computations, results in `NaN`, the accumulated value is `NaN` for **all** future invocations. If non-numeric inputs are possible, you are advised to type check and handle accordingly **before** passing the value to the accumulator function.
+
 </section>
 
 <!-- /.notes -->
diff --git a/lib/node_modules/@stdlib/stats/incr/pcorrmat/README.md b/lib/node_modules/@stdlib/stats/incr/pcorrmat/README.md
index 41e9b1c3d455..81b519be1856 100644
--- a/lib/node_modules/@stdlib/stats/incr/pcorrmat/README.md
+++ b/lib/node_modules/@stdlib/stats/incr/pcorrmat/README.md
@@ -162,6 +162,10 @@ out = accumulator();
 
 <section class="notes">
 
+## Notes
+
+-   Input values are **not** type checked. If provided `NaN` or a value which, when used in computations, results in `NaN`, the accumulated value is `NaN` for **all** future invocations. If non-numeric inputs are possible, you are advised to type check and handle accordingly **before** passing the value to the accumulator function.
+
 </section>
 
 <!-- /.notes -->