Polynomial feature mapping

ex5/polyFeatures.m

@@ -10,15 +10,13 @@ function [X_poly] = polyFeatures(X, p)
 X_poly = zeros(numel(X), p);
 
 % ====================== YOUR CODE HERE ======================
-% Instructions: Given a vector X, return a matrix X_poly where the p-th 
+% Instructions: Given a vector X, return a matrix X_poly where the p-th
 %               column of X contains the values of X to the p-th power.
 %
-% 
-
-
-
-
-
+%
+for i = 1 : p
+  X_poly(:,i) = X .^ i;
+end
 
 % =========================================================================