diff --git a/src/base/compute/owl_computation_optimiser.ml b/src/base/compute/owl_computation_optimiser.ml
index f4d263eed..50cd60edd 100644
--- a/src/base/compute/owl_computation_optimiser.ml
+++ b/src/base/compute/owl_computation_optimiser.ml
@@ -74,9 +74,9 @@ module Make (Operator : Owl_computation_operator_sig.Sig) = struct
       | Asinh -> pattern_000 x
       | Acosh -> pattern_000 x
       | Atanh -> pattern_000 x
-      | Min (_keep_dims, _axis) -> pattern_000 x 
-      | Max (_keep_dims, _axis) -> pattern_000 x 
-      | Sum (_keep_dims, _axis) -> pattern_000 x 
+      | Min (_keep_dims, _axis) -> pattern_000 x
+      | Max (_keep_dims, _axis) -> pattern_000 x
+      | Sum (_keep_dims, _axis) -> pattern_000 x
       | SumReduce _axis -> pattern_024 x
       | Signum -> pattern_000 x
       | Sigmoid -> pattern_000 x
diff --git a/src/base/core/owl_operator.ml b/src/base/core/owl_operator.ml
index 959526f04..e676324a3 100644
--- a/src/base/core/owl_operator.ml
+++ b/src/base/core/owl_operator.ml
@@ -138,17 +138,41 @@ module Make_Extend (M : ExtendSig) = struct
 
   let ( .!{;..}<- ) x s = M.set_fancy_ext s x
 
+  let ( .${} ) x s = M.get_slice_ext [| s |] x
+
   let ( .${;..} ) x s = M.get_slice_ext s x
 
+  let ( .${}<- ) x s = M.set_slice_ext [| s |] x
+
   let ( .${;..}<- ) x s = M.set_slice_ext s x
 end [@warning "-34"]
 
 module Make_Matrix (M : MatrixSig) = struct
   type ('a, 'b) op_t2 = ('a, 'b) M.t
 
-  let ( .%{;..} ) x i = M.get x i.(0) i.(1)
+  let ( .%{} ) x (i1, i2) = M.get x i1 i2
+
+  let ( .%{;..} ) x i =
+    if Array.length i = 2
+    then M.get x i.(0) i.(1)
+    else
+      failwith
+        (".%{} on matrices requires exactly two indices but I got "
+        ^ string_of_int
+        @@ Array.length i)
+
+
+  let ( .%{}<- ) x (i1, i2) = M.set x i1 i2
+
+  let ( .%{;..}<- ) x i =
+    if Array.length i = 2
+    then M.set x i.(0) i.(1)
+    else
+      failwith
+        (".%{}<- on matrices requires exactly two indices but I got "
+        ^ string_of_int
+        @@ Array.length i)
 
-  let ( .%{;..}<- ) x i = M.set x i.(0) i.(1)
 
   let ( *@ ) a b = M.dot a b
 end [@warning "-34"]
@@ -156,8 +180,12 @@ end [@warning "-34"]
 module Make_Ndarray (M : NdarraySig) = struct
   type ('a, 'b) op_t3 = ('a, 'b) M.t
 
+  let ( .%{} ) x i = M.get x [| i |]
+
   let ( .%{;..} ) x i = M.get x i
 
+  let ( .%{}<- ) x i = M.set x [| i |]
+
   let ( .%{;..}<- ) x i = M.set x i
 end [@warning "-34"]
 
diff --git a/src/base/core/owl_operator.mli b/src/base/core/owl_operator.mli
index cc00c10b3..a19bcab28 100644
--- a/src/base/core/owl_operator.mli
+++ b/src/base/core/owl_operator.mli
@@ -195,9 +195,13 @@ module Make_Extend (M : ExtendSig) : sig
   val ( .!{;..}<- ) : ('a, 'b) M.t -> Owl_types.index array -> ('a, 'b) M.t -> unit
   (** Operator of ``set_fancy`` *)
 
+  val ( .${} ) : ('a, 'b) M.t -> int list -> ('a, 'b) M.t
+
   val ( .${;..} ) : ('a, 'b) M.t -> int list array -> ('a, 'b) M.t
   (** Operator of ``get_slice`` *)
 
+  val ( .${}<- ) : ('a, 'b) M.t -> int list -> ('a, 'b) M.t -> unit
+
   val ( .${;..}<- ) : ('a, 'b) M.t -> int list array -> ('a, 'b) M.t -> unit
   (** Operator of ``set_slice`` *)
 end
@@ -208,9 +212,13 @@ module Make_Matrix (M : MatrixSig) : sig
   val ( *@ ) : ('a, 'b) M.t -> ('a, 'b) M.t -> ('a, 'b) M.t
   (** Operator of ``dot a b``, i.e. matrix multiplication ``a * b``. *)
 
+  val ( .%{} ) : ('a, 'b) M.t -> int * int -> 'a
+
   val ( .%{;..} ) : ('a, 'b) M.t -> int array -> 'a
   (** Operator of ``get`` *)
 
+  val ( .%{}<- ) : ('a, 'b) M.t -> int * int -> 'a -> unit
+
   val ( .%{;..}<- ) : ('a, 'b) M.t -> int array -> 'a -> unit
   (** Operator of ``set`` *)
 end
@@ -218,9 +226,13 @@ end
 (** {6 Ndarray-specific operators} *)
 
 module Make_Ndarray (M : NdarraySig) : sig
+  val ( .%{} ) : ('a, 'b) M.t -> int -> 'a
+
   val ( .%{;..} ) : ('a, 'b) M.t -> int array -> 'a
   (** Operator of ``get`` *)
 
+  val ( .%{}<- ) : ('a, 'b) M.t -> int -> 'a -> unit
+
   val ( .%{;..}<- ) : ('a, 'b) M.t -> int array -> 'a -> unit
   (** Operator of ``set`` *)
 end
diff --git a/test/unit_slicing_fancy.ml b/test/unit_slicing_fancy.ml
index 15ff5ec59..de4bd532a 100644
--- a/test/unit_slicing_fancy.ml
+++ b/test/unit_slicing_fancy.ml
@@ -280,6 +280,25 @@ module To_test = struct
     Arr.set z [| 9; 5; 0 |] 1.;
     Arr.set z [| 9; 6; 0 |] 2.;
     Arr.(x = z)
+
+
+  let test_35 () =
+    (* This just checks that the extended accessor syntax compiles *)
+    let open Arr in
+    let x = of_array [| 0.5; 0.7 |] [| 2 |] in
+    let y = of_array [| 0.8; 0.9; 1.1; 1.2 |] [| 2; 2 |] in
+    let v1 = l2norm' (x.${[ 1 ]} - of_array [| 0.7 |] [| 1 |]) in
+    let v2 = abs_float (x.%{1} -. 0.7) in
+    let v3 = abs_float (y.%{0; 1} -. 0.9) in
+    let v4 = l2norm' (y.${[ 0 ]; [ 0; -1 ]} - of_array [| 0.8; 0.9 |] [| 2 |]) in
+    Stdlib.(v1 < 1e-10 && v2 < 1e-10 && v3 < 1e-10 && v4 < 1e-10)
+
+
+  let test_36 () =
+    (* This just checks that the extended accessor syntax compiles *)
+    let open Mat in
+    let x = gaussian 2 2 in
+    Stdlib.(x.%{0; 1} = x.%{0, 1})
 end
 
 (* the tests *)
@@ -352,6 +371,10 @@ let test_33 () = Alcotest.(check bool) "test 33" true (To_test.test_33 ())
 
 let test_34 () = Alcotest.(check bool) "test 34" true (To_test.test_34 ())
 
+let test_35 () = Alcotest.(check bool) "test 35" true (To_test.test_35 ())
+
+let test_36 () = Alcotest.(check bool) "test 36" true (To_test.test_36 ())
+
 let test_set =
   [ "test 01", `Slow, test_01; "test 02", `Slow, test_02; "test 03", `Slow, test_03
   ; "test 04", `Slow, test_04; "test 05", `Slow, test_05; "test 06", `Slow, test_06
@@ -364,4 +387,4 @@ let test_set =
   ; "test 25", `Slow, test_25; "test 26", `Slow, test_26; "test 27", `Slow, test_27
   ; "test 28", `Slow, test_28; "test 29", `Slow, test_29; "test 30", `Slow, test_30
   ; "test 31", `Slow, test_31; "test 32", `Slow, test_32; "test 33", `Slow, test_33
-  ; "test 34", `Slow, test_34 ]
+  ; "test 34", `Slow, test_34; "test 35", `Slow, test_35; "test 36", `Slow, test_36 ]