Added test_predictOneVsAll

ex3/test_ex3.m

@@ -1,3 +1,5 @@
 %!test test_sanity()
 
 %!test test_oneVsAll()
+
+%!test test_predictOneVsAll()

ex3/test_predictOneVsAll.m

@@ -0,0 +1,24 @@
+function test_predictOneVsAll ()
+  epsilon = 1e-3;
+
+  % learning three classes
+  %
+  %                x < 1.5 => 1
+  %          1.5 < x < 3.5 => 2
+  %          3.5 < x       => 3
+  %
+  X = [0 1 2 3 4 5]';
+  y = [1 1 2 2 3 3]'; % direct classification
+  num_labels = 3;
+
+  all_theta = oneVsAll(X, y, num_labels, 0);
+  assert(size(all_theta), [3 2]);
+
+  yy = predictOneVsAll(all_theta, X);
+  assert(yy, y);
+
+  % predict ones we haven't seen yet (should match the original formula)
+  X = [-10 2.5 10.0]';
+  assert(predictOneVsAll(all_theta, X), [1 2 3]');
+
+endfunction