stat: fix grammar
diff --git a/stat/pca_helpers.go b/stat/pca_helpers.go
index 4f41978..1a17381 100644
--- a/stat/pca_helpers.go
+++ b/stat/pca_helpers.go
@@ -15,7 +15,7 @@
//
// If dst is nil, a new mat.Dense is allocated. If dst is not a zero matrix,
// the dimensions of dst and cdt must match otherwise TransformDisjunctive will
-// panic. If cdt contains values other 0 or 1 TransformDisjunctive will panic.
+// panic. If cdt contains values other than 0 or 1 TransformDisjunctive will panic.
//
// It is safe to reuse cdt as dst.
func TransformDisjunctive(dst *mat.Dense, cdt mat.Matrix) *mat.Dense {
