diff --git a/pkg/obiutils/array.go b/pkg/obiutils/array.go
index b616f31..0ec987c 100644
--- a/pkg/obiutils/array.go
+++ b/pkg/obiutils/array.go
@@ -93,5 +93,13 @@ func (matrix *Matrix[T]) Rows(i ...int) Matrix[T] {
 // It takes no parameters.
 // It returns two integers: the number of rows and the number of columns.
 func (matrix *Matrix[T]) Dim() (int, int) {
+	switch {
+	case *matrix == nil:
+		return 0, 0
+	case len(*matrix) == 0:
+		return 0, 0
+	case len((*matrix)[0]) == 0:
+		return len(*matrix), 0
+	}
 	return len(*matrix), len((*matrix)[0])
 }