DeprecationWarning: Passing 1d arrays as data is deprecated in 0.17
エラーの場合：
reg.predict([27])
正常の場合：
角カッコの数が２個だった。
reg.predict([[27]])
/usr/local/lib/python2.7/dist-packages/sklearn/utils/validation.py:386: DeprecationWarning: Passing 1d arrays as data is deprecated in 0.17 and willraise ValueError in 0.19. Reshape your data either using X.reshape(-1, 1) if your data has a single feature or X.reshape(1, -1) if it contains a single sample. DeprecationWarning) Traceback (most recent call last): File "vm_main.py", line 33, in <module> import main File "/tmp/vmuser_aetkxispzi/main.py", line 2, in <module> import studentMain File "/tmp/vmuser_aetkxispzi/studentMain.py", line 5, in <module> import regressionQuiz as student_code File "/tmp/vmuser_aetkxispzi/regressionQuiz.py", line 15, in <module> print "katie's net worth prediction:", reg.predict([27,27]) File "/usr/local/lib/python2.7/dist-packages/sklearn/linear_model/base.py", line 200, in predict return self._decision_function(X) File "/usr/local/lib/python2.7/dist-packages/sklearn/linear_model/base.py", line 185, in _decision_function dense_output=True) + self.intercept_ File "/usr/local/lib/python2.7/dist-packages/sklearn/utils/extmath.py", line 184, in safe_sparse_dot return fast_dot(a, b) ValueError: shapes (1,2) and (1,1) not aligned: 2 (dim 1) != 1 (dim 0) katie's net worth prediction:
この記法は， shape に (1, -1) や (-1, 1) を指定すると， それぞれ2次元の横ベクトルや縦ベクトルを簡便に作ることができます．
