plot1

![plot1](https://cloud.githubusercontent.com/assets/4927499/2939960/8a488dda-d965-11e3-84f6-4c17cad19c35.png)
![plot2](https://cloud.githubusercontent.com/assets/4927499/2939961/9435c100-d965-11e3-8a0e-a6dae2daa5a3.png)
![plot3](https://cloud.githubusercontent.com/assets/4927499/2939962/97b1d1de-d965-11e3-9f5c-7e6c72a3efaf.png)
![plot4](https://cloud.githubusercontent.com/assets/4927499/2939963/9b0581d2-d965-11e3-9b96-156b05abab18.png)