diff --git a/src/matrix.js b/src/matrix.js
index 4fb9c2e..82f685b 100644
--- a/src/matrix.js
+++ b/src/matrix.js
@@ -436,6 +436,14 @@ Sylvester.Matrix.prototype = {
       this.elements.push([elements[i]]);
     }
     return this;
+  },
+
+  setElement: function(i,j,element) {
+    if (i < 1 || i > this.elements.length || j < 1 || j > this.elements[0].length) { 
+      return null; 
+    }
+    this.elements[i-1][j-1] = element;
+    return this;
   }
 };
 
diff --git a/src/vector.js b/src/vector.js
index 0d30e05..5a06464 100644
--- a/src/vector.js
+++ b/src/vector.js
@@ -251,6 +251,14 @@ Sylvester.Vector.prototype = {
   setElements: function(els) {
     this.elements = (els.elements || els).slice();
     return this;
+  }	,
+
+  setElement: function(i, el) {
+    if (i < 1 || i > this.elements.length) {
+      return null;
+    };
+    this.elements[i-1] = el;
+    return this;
   }
 };
 
diff --git a/test/specs/matrix_spec.js b/test/specs/matrix_spec.js
index d93036f..ac8f960 100644
--- a/test/specs/matrix_spec.js
+++ b/test/specs/matrix_spec.js
@@ -334,4 +334,26 @@ JS.ENV.MatrixSpec = JS.Test.describe("Matrix", function() { with(this) {
       [0,0,0,7]
     ]))
   }})
+
+  test("setElements", function() { with(this) {
+    var M = $M([
+      [0,3,4,8],
+      [3,9,7,3]
+    ])
+    assertEqual( '[0, 3, 4, 8]\n[3, 9, 7, 3]', M.inspect() )
+    assertEqual( '[1, 2, 3, 4]\n[5, 6, 7, 8]', M.setElements([[1,2,3,4],[5,6,7,8]]).inspect() )
+    assertEqual( '[3, 4, 6, 9]', M.setElements([[3,4,6,9]]).inspect() )
+    assertEqual( '[1]\n[3]\n[8]\n[4]', M.setElements([[1],[3],[8],[4]]).inspect() )
+    assertEqual( '[44]', M.setElements([[44]]).inspect() )
+    assertEqual( '[]', M.setElements([]).inspect() )
+  }})
+
+  test("setElement", function() { with(this) {
+    var M = $M([
+      [0,3,4,8],
+      [3,9,7,3]
+    ])
+    assertEqual( '[0, 3, 4, 8]\n[3, 9, 7, 3]', M.inspect() )
+    assertEqual( '[0, 3, 4, 8]\n[3, 4, 7, 3]', M.setElement(2,2,4).inspect() )
+  }})
 }})
diff --git a/test/specs/vector_spec.js b/test/specs/vector_spec.js
index f8788a9..50984f2 100644
--- a/test/specs/vector_spec.js
+++ b/test/specs/vector_spec.js
@@ -175,4 +175,18 @@ JS.ENV.VectorSpec = JS.Test.describe("Vector", function() { with(this) {
     assert( $V([12,1]).rotate(Math.PI/2, [5,1]).eql([5,8]) )
     assert( Vector.i.rotate(-Math.PI/2, Sylvester.Line.create([10, 0, 100], Vector.k)).eql([10,9,0]) )
   }})
+
+  test("setElement", function() { with(this) {
+    var V = $V([0,3,4,5])
+    assertEqual( 6, V.setElement(1,6).e(1) )
+    assertEqual( 3, V.e(2) )
+    assertEqual( 4, V.e(3) )
+    assertEqual( 5, V.e(4) )
+    assertEqual( null, V.e(5) )
+    assertEqual( 6, V.e(1) )
+    assertEqual( 3, V.e(2) )
+    assertEqual( 7, V.setElement(3,7).e(3) )
+    assertEqual( 5, V.e(4) )
+    assertEqual( null, V.e(5) )
+  }})
 }})