diff --git a/W3/machine-learning-ex2/ex2/plotData.m b/W3/machine-learning-ex2/ex2/plotData.m
index 5df9d3f..84d8e00 100644
--- a/W3/machine-learning-ex2/ex2/plotData.m
+++ b/W3/machine-learning-ex2/ex2/plotData.m
@@ -12,13 +12,14 @@ figure; hold on;
 %               examples and 'ko' for the negative examples.
 %
 
+% Find Indices of Positive and Negative Examples
+pos = find(y==1); neg = find(y == 0);
+% Plot Examples
 
-
-
-
-
-
-
+plot(X(pos, 1), X(pos, 2), 'k+','LineWidth', 2, ...
+'MarkerSize', 7);
+plot(X(neg, 1), X(neg, 2), 'ko', 'MarkerFaceColor', 'y', ...
+'MarkerSize', 7);
 
 % =========================================================================
 
diff --git a/W3/machine-learning-ex2/ex2/sigmoid.m b/W3/machine-learning-ex2/ex2/sigmoid.m
index aeb7572..371972b 100644
--- a/W3/machine-learning-ex2/ex2/sigmoid.m
+++ b/W3/machine-learning-ex2/ex2/sigmoid.m
@@ -10,8 +10,7 @@ g = zeros(size(z));
 %               vector or scalar).
 
 
-
-
+g  = ones(size(z)) ./ (1 + exp(-z));
 
 % =============================================================
 
diff --git a/W3/machine-learning-ex2/ex2/token.mat b/W3/machine-learning-ex2/ex2/token.mat
new file mode 100644
index 0000000..164fc2f
Binary files /dev/null and b/W3/machine-learning-ex2/ex2/token.mat differ