[My notebook] (http://nbviewer.ipython.org/github/S-Nakada/HW2014/blob/master/hw_nov12.ipynb)
[My notebook] (http://nbviewer.ipython.org/github/S-Nakada/HW2014/blob/master/hw_nov19.ipynb)
[My notebook] (http://nbviewer.ipython.org/github/S-Nakada/HW2014/blob/master/hw_nov26.ipynb)
[My notebook] (http://nbviewer.ipython.org/github/S-Nakada/HW2014/blob/master/hw_dec3.ipynb)
[My notebook] (http://nbviewer.ipython.org/github/S-Nakada/HW2014/blob/master/hw_dec10.ipynb)